; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s

declare void @use8(i8)
declare void @use16(i16)
declare void @use32(i32)

; There should be no 'and' instructions left in any test.

define i32 @test1(i32 %A) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    ret i32 0
;
  %B = and i32 %A, 0
  ret i32 %B
}

define i32 @test2(i32 %A) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:    ret i32 [[A:%.*]]
;
  %B = and i32 %A, -1
  ret i32 %B
}

define i1 @test3(i1 %A) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:    ret i1 false
;
  %B = and i1 %A, false
  ret i1 %B
}

define i1 @test3_logical(i1 %A) {
; CHECK-LABEL: @test3_logical(
; CHECK-NEXT:    ret i1 false
;
  %B = select i1 %A, i1 false, i1 false
  ret i1 %B
}

define i1 @test4(i1 %A) {
; CHECK-LABEL: @test4(
; CHECK-NEXT:    ret i1 [[A:%.*]]
;
  %B = and i1 %A, true
  ret i1 %B
}

define i1 @test4_logical(i1 %A) {
; CHECK-LABEL: @test4_logical(
; CHECK-NEXT:    ret i1 [[A:%.*]]
;
  %B = select i1 %A, i1 true, i1 false
  ret i1 %B
}

define i32 @test5(i32 %A) {
; CHECK-LABEL: @test5(
; CHECK-NEXT:    ret i32 [[A:%.*]]
;
  %B = and i32 %A, %A
  ret i32 %B
}

define i1 @test6(i1 %A) {
; CHECK-LABEL: @test6(
; CHECK-NEXT:    ret i1 [[A:%.*]]
;
  %B = and i1 %A, %A
  ret i1 %B
}

define i1 @test6_logical(i1 %A) {
; CHECK-LABEL: @test6_logical(
; CHECK-NEXT:    ret i1 [[A:%.*]]
;
  %B = select i1 %A, i1 %A, i1 false
  ret i1 %B
}

; A & ~A == 0
define i32 @test7(i32 %A) {
; CHECK-LABEL: @test7(
; CHECK-NEXT:    ret i32 0
;
  %NotA = xor i32 %A, -1
  %B = and i32 %A, %NotA
  ret i32 %B
}

; AND associates
define i8 @test8(i8 %A) {
; CHECK-LABEL: @test8(
; CHECK-NEXT:    ret i8 0
;
  %B = and i8 %A, 3
  %C = and i8 %B, 4
  ret i8 %C
}

; Test of sign bit, convert to setle %A, 0
define i1 @test9(i32 %A) {
; CHECK-LABEL: @test9(
; CHECK-NEXT:    [[C:%.*]] = icmp slt i32 [[A:%.*]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %B = and i32 %A, -2147483648
  %C = icmp ne i32 %B, 0
  ret i1 %C
}

; Test of sign bit, convert to setle %A, 0
define i1 @test9a(i32 %A) {
; CHECK-LABEL: @test9a(
; CHECK-NEXT:    [[C:%.*]] = icmp slt i32 [[A:%.*]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %B = and i32 %A, -2147483648
  %C = icmp ne i32 %B, 0
  ret i1 %C
}

define i32 @test10(i32 %A) {
; CHECK-LABEL: @test10(
; CHECK-NEXT:    ret i32 1
;
  %B = and i32 %A, 12
  %C = xor i32 %B, 15
  ; (X ^ C1) & C2 --> (X & C2) ^ (C1&C2)
  %D = and i32 %C, 1
  ret i32 %D
}

define i32 @test11(i32 %A, ptr %P) {
; CHECK-LABEL: @test11(
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[A:%.*]], -4
; CHECK-NEXT:    [[C:%.*]] = xor i32 [[TMP1]], 15
; CHECK-NEXT:    store i32 [[C]], ptr [[P:%.*]], align 4
; CHECK-NEXT:    ret i32 3
;
  %B = or i32 %A, 3
  %C = xor i32 %B, 12
  ; additional use of C
  store i32 %C, ptr %P
  ; %C = and uint %B, 3 --> 3
  %D = and i32 %C, 3
  ret i32 %D
}

define i1 @test12(i32 %A, i32 %B) {
; CHECK-LABEL: @test12(
; CHECK-NEXT:    [[C1:%.*]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i1 [[C1]]
;
  %C1 = icmp ult i32 %A, %B
  %C2 = icmp ule i32 %A, %B
  ; (A < B) & (A <= B) === (A < B)
  %D = and i1 %C1, %C2
  ret i1 %D
}

define i1 @test12_logical(i32 %A, i32 %B) {
; CHECK-LABEL: @test12_logical(
; CHECK-NEXT:    [[C1:%.*]] = icmp ult i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i1 [[C1]]
;
  %C1 = icmp ult i32 %A, %B
  %C2 = icmp ule i32 %A, %B
  ; (A < B) & (A <= B) === (A < B)
  %D = select i1 %C1, i1 %C2, i1 false
  ret i1 %D
}

define i1 @test13(i32 %A, i32 %B) {
; CHECK-LABEL: @test13(
; CHECK-NEXT:    ret i1 false
;
  %C1 = icmp ult i32 %A, %B
  %C2 = icmp ugt i32 %A, %B
  ; (A < B) & (A > B) === false
  %D = and i1 %C1, %C2
  ret i1 %D
}

define i1 @test13_logical(i32 %A, i32 %B) {
; CHECK-LABEL: @test13_logical(
; CHECK-NEXT:    ret i1 false
;
  %C1 = icmp ult i32 %A, %B
  %C2 = icmp ugt i32 %A, %B
  ; (A < B) & (A > B) === false
  %D = select i1 %C1, i1 %C2, i1 false
  ret i1 %D
}

define i1 @test14(i8 %A) {
; CHECK-LABEL: @test14(
; CHECK-NEXT:    [[C:%.*]] = icmp slt i8 [[A:%.*]], 0
; CHECK-NEXT:    ret i1 [[C]]
;
  %B = and i8 %A, -128
  %C = icmp ne i8 %B, 0
  ret i1 %C
}

define i8 @test15(i8 %A) {
; CHECK-LABEL: @test15(
; CHECK-NEXT:    ret i8 0
;
  %B = lshr i8 %A, 7
  ; Always equals zero
  %C = and i8 %B, 2
  ret i8 %C
}

define i8 @test16(i8 %A) {
; CHECK-LABEL: @test16(
; CHECK-NEXT:    ret i8 0
;
  %B = shl i8 %A, 2
  %C = and i8 %B, 3
  ret i8 %C
}

define i1 @test18(i32 %A) {
; CHECK-LABEL: @test18(
; CHECK-NEXT:    [[C:%.*]] = icmp ugt i32 [[A:%.*]], 127
; CHECK-NEXT:    ret i1 [[C]]
;
  %B = and i32 %A, -128
  ;; C >= 128
  %C = icmp ne i32 %B, 0
  ret i1 %C
}

define <2 x i1> @test18_vec(<2 x i32> %A) {
; CHECK-LABEL: @test18_vec(
; CHECK-NEXT:    [[C:%.*]] = icmp ugt <2 x i32> [[A:%.*]], <i32 127, i32 127>
; CHECK-NEXT:    ret <2 x i1> [[C]]
;
  %B = and <2 x i32> %A, <i32 -128, i32 -128>
  %C = icmp ne <2 x i32> %B, zeroinitializer
  ret <2 x i1> %C
}

define i1 @test18a(i8 %A) {
; CHECK-LABEL: @test18a(
; CHECK-NEXT:    [[C:%.*]] = icmp ult i8 [[A:%.*]], 2
; CHECK-NEXT:    ret i1 [[C]]
;
  %B = and i8 %A, -2
  %C = icmp eq i8 %B, 0
  ret i1 %C
}

define <2 x i1> @test18a_vec(<2 x i8> %A) {
; CHECK-LABEL: @test18a_vec(
; CHECK-NEXT:    [[C:%.*]] = icmp ult <2 x i8> [[A:%.*]], <i8 2, i8 2>
; CHECK-NEXT:    ret <2 x i1> [[C]]
;
  %B = and <2 x i8> %A, <i8 -2, i8 -2>
  %C = icmp eq <2 x i8> %B, zeroinitializer
  ret <2 x i1> %C
}

define i32 @test19(i32 %A) {
; CHECK-LABEL: @test19(
; CHECK-NEXT:    [[B:%.*]] = shl i32 [[A:%.*]], 3
; CHECK-NEXT:    ret i32 [[B]]
;
  %B = shl i32 %A, 3
  ;; Clearing a zero bit
  %C = and i32 %B, -2
  ret i32 %C
}

define i8 @test20(i8 %A) {
; CHECK-LABEL: @test20(
; CHECK-NEXT:    [[C:%.*]] = lshr i8 [[A:%.*]], 7
; CHECK-NEXT:    ret i8 [[C]]
;
  %C = lshr i8 %A, 7
  ;; Unneeded
  %D = and i8 %C, 1
  ret i8 %D
}

define i1 @test23(i32 %A) {
; CHECK-LABEL: @test23(
; CHECK-NEXT:    [[D:%.*]] = icmp eq i32 [[A:%.*]], 2
; CHECK-NEXT:    ret i1 [[D]]
;
  %B = icmp sgt i32 %A, 1
  %C = icmp sle i32 %A, 2
  %D = and i1 %B, %C
  ret i1 %D
}

define i1 @test23_logical(i32 %A) {
; CHECK-LABEL: @test23_logical(
; CHECK-NEXT:    [[D:%.*]] = icmp eq i32 [[A:%.*]], 2
; CHECK-NEXT:    ret i1 [[D]]
;
  %B = icmp sgt i32 %A, 1
  %C = icmp sle i32 %A, 2
  %D = select i1 %B, i1 %C, i1 false
  ret i1 %D
}

define <2 x i1> @test23vec(<2 x i32> %A) {
; CHECK-LABEL: @test23vec(
; CHECK-NEXT:    [[D:%.*]] = icmp eq <2 x i32> [[A:%.*]], <i32 2, i32 2>
; CHECK-NEXT:    ret <2 x i1> [[D]]
;
  %B = icmp sgt <2 x i32> %A, <i32 1, i32 1>
  %C = icmp sle <2 x i32> %A, <i32 2, i32 2>
  %D = and <2 x i1> %B, %C
  ret <2 x i1> %D
}

define i1 @test24(i32 %A) {
; CHECK-LABEL: @test24(
; CHECK-NEXT:    [[D:%.*]] = icmp sgt i32 [[A:%.*]], 2
; CHECK-NEXT:    ret i1 [[D]]
;
  %B = icmp sgt i32 %A, 1
  %C = icmp ne i32 %A, 2
  ;; A > 2
  %D = and i1 %B, %C
  ret i1 %D
}

define i1 @test24_logical(i32 %A) {
; CHECK-LABEL: @test24_logical(
; CHECK-NEXT:    [[D:%.*]] = icmp sgt i32 [[A:%.*]], 2
; CHECK-NEXT:    ret i1 [[D]]
;
  %B = icmp sgt i32 %A, 1
  %C = icmp ne i32 %A, 2
  ;; A > 2
  %D = select i1 %B, i1 %C, i1 false
  ret i1 %D
}

define i1 @test25(i32 %A) {
; CHECK-LABEL: @test25(
; CHECK-NEXT:    [[TMP1:%.*]] = add i32 [[A:%.*]], -50
; CHECK-NEXT:    [[D:%.*]] = icmp ult i32 [[TMP1]], 50
; CHECK-NEXT:    ret i1 [[D]]
;
  %B = icmp sge i32 %A, 50
  %C = icmp slt i32 %A, 100
  %D = and i1 %B, %C
  ret i1 %D
}

define i1 @test25_logical(i32 %A) {
; CHECK-LABEL: @test25_logical(
; CHECK-NEXT:    [[TMP1:%.*]] = add i32 [[A:%.*]], -50
; CHECK-NEXT:    [[D:%.*]] = icmp ult i32 [[TMP1]], 50
; CHECK-NEXT:    ret i1 [[D]]
;
  %B = icmp sge i32 %A, 50
  %C = icmp slt i32 %A, 100
  %D = select i1 %B, i1 %C, i1 false
  ret i1 %D
}

define <2 x i1> @test25vec(<2 x i32> %A) {
; CHECK-LABEL: @test25vec(
; CHECK-NEXT:    [[TMP1:%.*]] = add <2 x i32> [[A:%.*]], <i32 -50, i32 -50>
; CHECK-NEXT:    [[D:%.*]] = icmp ult <2 x i32> [[TMP1]], <i32 50, i32 50>
; CHECK-NEXT:    ret <2 x i1> [[D]]
;
  %B = icmp sge <2 x i32> %A, <i32 50, i32 50>
  %C = icmp slt <2 x i32> %A, <i32 100, i32 100>
  %D = and <2 x i1> %B, %C
  ret <2 x i1> %D
}

define i8 @test27(i8 %A) {
; CHECK-LABEL: @test27(
; CHECK-NEXT:    ret i8 0
;
  %B = and i8 %A, 4
  %C = sub i8 %B, 16
  ;; 0xF0
  %D = and i8 %C, -16
  %E = add i8 %D, 16
  ret i8 %E
}

;; No demand for extra sign bits.

define i32 @ashr_lowmask(i32 %x) {
; CHECK-LABEL: @ashr_lowmask(
; CHECK-NEXT:    [[TMP1:%.*]] = lshr i32 [[X:%.*]], 24
; CHECK-NEXT:    ret i32 [[TMP1]]
;
  %a = ashr i32 %x, 24
  %r = and i32 %a, 255
  ret i32 %r
}

define i32 @ashr_lowmask_use(i32 %x) {
; CHECK-LABEL: @ashr_lowmask_use(
; CHECK-NEXT:    [[A:%.*]] = ashr i32 [[X:%.*]], 1
; CHECK-NEXT:    call void @use32(i32 [[A]])
; CHECK-NEXT:    [[R:%.*]] = lshr i32 [[X]], 1
; CHECK-NEXT:    ret i32 [[R]]
;
  %a = ashr i32 %x, 1
  call void @use32(i32 %a)
  %r = and i32 %a, 2147483647
  ret i32 %r
}

define <2 x i8> @ashr_lowmask_use_splat(<2 x i8> %x, ptr %p) {
; CHECK-LABEL: @ashr_lowmask_use_splat(
; CHECK-NEXT:    [[A:%.*]] = ashr <2 x i8> [[X:%.*]], <i8 7, i8 7>
; CHECK-NEXT:    store <2 x i8> [[A]], ptr [[P:%.*]], align 2
; CHECK-NEXT:    [[R:%.*]] = lshr <2 x i8> [[X]], <i8 7, i8 7>
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %a = ashr <2 x i8> %x, <i8 7, i8 7>
  store <2 x i8> %a, ptr %p
  %r = and <2 x i8> %a, <i8 1, i8 1>
  ret <2 x i8> %r
}

; negative test - must keep all low bits

define i32 @ashr_not_lowmask1_use(i32 %x) {
; CHECK-LABEL: @ashr_not_lowmask1_use(
; CHECK-NEXT:    [[A:%.*]] = ashr i32 [[X:%.*]], 24
; CHECK-NEXT:    call void @use32(i32 [[A]])
; CHECK-NEXT:    [[R:%.*]] = and i32 [[A]], 254
; CHECK-NEXT:    ret i32 [[R]]
;
  %a = ashr i32 %x, 24
  call void @use32(i32 %a)
  %r = and i32 %a, 254
  ret i32 %r
}

; negative test - must keep all low bits

define i32 @ashr_not_lowmask2_use(i32 %x) {
; CHECK-LABEL: @ashr_not_lowmask2_use(
; CHECK-NEXT:    [[A:%.*]] = ashr i32 [[X:%.*]], 24
; CHECK-NEXT:    call void @use32(i32 [[A]])
; CHECK-NEXT:    [[R:%.*]] = and i32 [[A]], 127
; CHECK-NEXT:    ret i32 [[R]]
;
  %a = ashr i32 %x, 24
  call void @use32(i32 %a)
  %r = and i32 %a, 127
  ret i32 %r
}

; negative test - must keep only low bits

define i32 @ashr_not_lowmask3_use(i32 %x) {
; CHECK-LABEL: @ashr_not_lowmask3_use(
; CHECK-NEXT:    [[A:%.*]] = ashr i32 [[X:%.*]], 24
; CHECK-NEXT:    call void @use32(i32 [[A]])
; CHECK-NEXT:    [[R:%.*]] = and i32 [[A]], 511
; CHECK-NEXT:    ret i32 [[R]]
;
  %a = ashr i32 %x, 24
  call void @use32(i32 %a)
  %r = and i32 %a, 511
  ret i32 %r
}

define i32 @test29(i8 %X) {
; CHECK-LABEL: @test29(
; CHECK-NEXT:    [[Y:%.*]] = zext i8 [[X:%.*]] to i32
; CHECK-NEXT:    ret i32 [[Y]]
;
  %Y = zext i8 %X to i32
  ;; Zero extend makes this unneeded.
  %Z = and i32 %Y, 255
  ret i32 %Z
}

define i32 @test30(i1 %X) {
; CHECK-LABEL: @test30(
; CHECK-NEXT:    [[Y:%.*]] = zext i1 [[X:%.*]] to i32
; CHECK-NEXT:    ret i32 [[Y]]
;
  %Y = zext i1 %X to i32
  %Z = and i32 %Y, 1
  ret i32 %Z
}

define i32 @test31(i1 %X) {
; CHECK-LABEL: @test31(
; CHECK-NEXT:    [[Z:%.*]] = select i1 [[X:%.*]], i32 16, i32 0
; CHECK-NEXT:    ret i32 [[Z]]
;
  %Y = zext i1 %X to i32
  %Z = shl i32 %Y, 4
  %A = and i32 %Z, 16
  ret i32 %A
}

; Demanded bit analysis allows us to eliminate the add.

define <2 x i32> @and_demanded_bits_splat_vec(<2 x i32> %x) {
; CHECK-LABEL: @and_demanded_bits_splat_vec(
; CHECK-NEXT:    [[Z:%.*]] = and <2 x i32> [[X:%.*]], <i32 7, i32 7>
; CHECK-NEXT:    ret <2 x i32> [[Z]]
;
  %y = add <2 x i32> %x, <i32 8, i32 8>
  %z = and <2 x i32> %y, <i32 7, i32 7>
  ret <2 x i32> %z
}

; zext (x >> 8) has all zeros in the high 24-bits:  0x000000xx
; (y | 255) has all ones in the low 8-bits: 0xyyyyyyff
; 'and' of those is all known bits - it's just 'z'.

define i32 @and_zext_demanded(i16 %x, i32 %y) {
; CHECK-LABEL: @and_zext_demanded(
; CHECK-NEXT:    [[S:%.*]] = lshr i16 [[X:%.*]], 8
; CHECK-NEXT:    [[Z:%.*]] = zext i16 [[S]] to i32
; CHECK-NEXT:    ret i32 [[Z]]
;
  %s = lshr i16 %x, 8
  %z = zext i16 %s to i32
  %o = or i32 %y, 255
  %a = and i32 %o, %z
  ret i32 %a
}

define i32 @test32(i32 %In) {
; CHECK-LABEL: @test32(
; CHECK-NEXT:    ret i32 0
;
  %Y = and i32 %In, 16
  %Z = lshr i32 %Y, 2
  %A = and i32 %Z, 1
  ret i32 %A
}

;; Code corresponding to one-bit bitfield ^1.
define i32 @test33(i32 %b) {
; CHECK-LABEL: @test33(
; CHECK-NEXT:    [[T13:%.*]] = xor i32 [[B:%.*]], 1
; CHECK-NEXT:    ret i32 [[T13]]
;
  %t4.mask = and i32 %b, 1
  %t10 = xor i32 %t4.mask, 1
  %t12 = and i32 %b, -2
  %t13 = or i32 %t12, %t10
  ret i32 %t13
}

define i32 @test33b(i32 %b) {
; CHECK-LABEL: @test33b(
; CHECK-NEXT:    [[T13:%.*]] = xor i32 [[B:%.*]], 1
; CHECK-NEXT:    ret i32 [[T13]]
;
  %t4.mask = and i32 %b, 1
  %t10 = xor i32 %t4.mask, 1
  %t12 = and i32 %b, -2
  %t13 = or i32 %t10, %t12
  ret i32 %t13
}

define <2 x i32> @test33vec(<2 x i32> %b) {
; CHECK-LABEL: @test33vec(
; CHECK-NEXT:    [[T13:%.*]] = xor <2 x i32> [[B:%.*]], <i32 1, i32 1>
; CHECK-NEXT:    ret <2 x i32> [[T13]]
;
  %t4.mask = and <2 x i32> %b, <i32 1, i32 1>
  %t10 = xor <2 x i32> %t4.mask, <i32 1, i32 1>
  %t12 = and <2 x i32> %b, <i32 -2, i32 -2>
  %t13 = or <2 x i32> %t12, %t10
  ret <2 x i32> %t13
}

define <2 x i32> @test33vecb(<2 x i32> %b) {
; CHECK-LABEL: @test33vecb(
; CHECK-NEXT:    [[T13:%.*]] = xor <2 x i32> [[B:%.*]], <i32 1, i32 1>
; CHECK-NEXT:    ret <2 x i32> [[T13]]
;
  %t4.mask = and <2 x i32> %b, <i32 1, i32 1>
  %t10 = xor <2 x i32> %t4.mask, <i32 1, i32 1>
  %t12 = and <2 x i32> %b, <i32 -2, i32 -2>
  %t13 = or <2 x i32> %t10, %t12
  ret <2 x i32> %t13
}

define i32 @test34(i32 %A, i32 %B) {
; CHECK-LABEL: @test34(
; CHECK-NEXT:    ret i32 [[B:%.*]]
;
  %t2 = or i32 %B, %A
  %t4 = and i32 %t2, %B
  ret i32 %t4
}

; FIXME: This test should only need -passes=instsimplify (ValueTracking / computeKnownBits), not -passes=instcombine.

define <2 x i32> @PR24942(<2 x i32> %x) {
; CHECK-LABEL: @PR24942(
; CHECK-NEXT:    ret <2 x i32> zeroinitializer
;
  %lshr = lshr <2 x i32> %x, <i32 31, i32 31>
  %and = and <2 x i32> %lshr, <i32 2, i32 2>
  ret <2 x i32> %and
}

define i64 @test35(i32 %X) {
; CHECK-LABEL: @test35(
; CHECK-NEXT:    [[TMP1:%.*]] = sub i32 0, [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i32 [[TMP1]], 240
; CHECK-NEXT:    [[RES:%.*]] = zext i32 [[TMP2]] to i64
; CHECK-NEXT:    ret i64 [[RES]]
;
  %zext = zext i32 %X to i64
  %zsub = sub i64 0, %zext
  %res = and i64 %zsub, 240
  ret i64 %res
}

define <2 x i64> @test35_uniform(<2 x i32> %X) {
; CHECK-LABEL: @test35_uniform(
; CHECK-NEXT:    [[TMP1:%.*]] = sub <2 x i32> zeroinitializer, [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i32> [[TMP1]], <i32 240, i32 240>
; CHECK-NEXT:    [[RES:%.*]] = zext <2 x i32> [[TMP2]] to <2 x i64>
; CHECK-NEXT:    ret <2 x i64> [[RES]]
;
  %zext = zext <2 x i32> %X to <2 x i64>
  %zsub = sub <2 x i64> zeroinitializer, %zext
  %res = and <2 x i64> %zsub, <i64 240, i64 240>
  ret <2 x i64> %res
}

define i64 @test36(i32 %X) {
; CHECK-LABEL: @test36(
; CHECK-NEXT:    [[TMP1:%.*]] = add i32 [[X:%.*]], 7
; CHECK-NEXT:    [[TMP2:%.*]] = and i32 [[TMP1]], 240
; CHECK-NEXT:    [[RES:%.*]] = zext i32 [[TMP2]] to i64
; CHECK-NEXT:    ret i64 [[RES]]
;
  %zext = zext i32 %X to i64
  %zsub = add i64 %zext, 7
  %res = and i64 %zsub, 240
  ret i64 %res
}

define <2 x i64> @test36_uniform(<2 x i32> %X) {
; CHECK-LABEL: @test36_uniform(
; CHECK-NEXT:    [[TMP1:%.*]] = add <2 x i32> [[X:%.*]], <i32 7, i32 7>
; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i32> [[TMP1]], <i32 240, i32 240>
; CHECK-NEXT:    [[RES:%.*]] = zext <2 x i32> [[TMP2]] to <2 x i64>
; CHECK-NEXT:    ret <2 x i64> [[RES]]
;
  %zext = zext <2 x i32> %X to <2 x i64>
  %zsub = add <2 x i64> %zext, <i64 7, i64 7>
  %res = and <2 x i64> %zsub, <i64 240, i64 240>
  ret <2 x i64> %res
}

define <2 x i64> @test36_undef(<2 x i32> %X) {
; CHECK-LABEL: @test36_undef(
; CHECK-NEXT:    [[ZEXT:%.*]] = zext <2 x i32> [[X:%.*]] to <2 x i64>
; CHECK-NEXT:    [[ZSUB:%.*]] = add <2 x i64> [[ZEXT]], <i64 7, i64 undef>
; CHECK-NEXT:    [[RES:%.*]] = and <2 x i64> [[ZSUB]], <i64 240, i64 undef>
; CHECK-NEXT:    ret <2 x i64> [[RES]]
;
  %zext = zext <2 x i32> %X to <2 x i64>
  %zsub = add <2 x i64> %zext, <i64 7, i64 undef>
  %res = and <2 x i64> %zsub, <i64 240, i64 undef>
  ret <2 x i64> %res
}

define i64 @test37(i32 %X) {
; CHECK-LABEL: @test37(
; CHECK-NEXT:    [[TMP1:%.*]] = mul i32 [[X:%.*]], 7
; CHECK-NEXT:    [[TMP2:%.*]] = and i32 [[TMP1]], 240
; CHECK-NEXT:    [[RES:%.*]] = zext i32 [[TMP2]] to i64
; CHECK-NEXT:    ret i64 [[RES]]
;
  %zext = zext i32 %X to i64
  %zsub = mul i64 %zext, 7
  %res = and i64 %zsub, 240
  ret i64 %res
}

define <2 x i64> @test37_uniform(<2 x i32> %X) {
; CHECK-LABEL: @test37_uniform(
; CHECK-NEXT:    [[TMP1:%.*]] = mul <2 x i32> [[X:%.*]], <i32 7, i32 7>
; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i32> [[TMP1]], <i32 240, i32 240>
; CHECK-NEXT:    [[RES:%.*]] = zext <2 x i32> [[TMP2]] to <2 x i64>
; CHECK-NEXT:    ret <2 x i64> [[RES]]
;
  %zext = zext <2 x i32> %X to <2 x i64>
  %zsub = mul <2 x i64> %zext, <i64 7, i64 7>
  %res = and <2 x i64> %zsub, <i64 240, i64 240>
  ret <2 x i64> %res
}

define <2 x i64> @test37_nonuniform(<2 x i32> %X) {
; CHECK-LABEL: @test37_nonuniform(
; CHECK-NEXT:    [[ZEXT:%.*]] = zext <2 x i32> [[X:%.*]] to <2 x i64>
; CHECK-NEXT:    [[ZSUB:%.*]] = mul nuw nsw <2 x i64> [[ZEXT]], <i64 7, i64 9>
; CHECK-NEXT:    [[RES:%.*]] = and <2 x i64> [[ZSUB]], <i64 240, i64 110>
; CHECK-NEXT:    ret <2 x i64> [[RES]]
;
  %zext = zext <2 x i32> %X to <2 x i64>
  %zsub = mul <2 x i64> %zext, <i64 7, i64 9>
  %res = and <2 x i64> %zsub, <i64 240, i64 110>
  ret <2 x i64> %res
}

define i64 @test38(i32 %X) {
; CHECK-LABEL: @test38(
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[X:%.*]], 240
; CHECK-NEXT:    [[RES:%.*]] = zext i32 [[TMP1]] to i64
; CHECK-NEXT:    ret i64 [[RES]]
;
  %zext = zext i32 %X to i64
  %zsub = xor i64 %zext, 7
  %res = and i64 %zsub, 240
  ret i64 %res
}

define i64 @test39(i32 %X) {
; CHECK-LABEL: @test39(
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[X:%.*]], 240
; CHECK-NEXT:    [[RES:%.*]] = zext i32 [[TMP1]] to i64
; CHECK-NEXT:    ret i64 [[RES]]
;
  %zext = zext i32 %X to i64
  %zsub = or i64 %zext, 7
  %res = and i64 %zsub, 240
  ret i64 %res
}

define i32 @lowmask_add_zext(i8 %x, i32 %y) {
; CHECK-LABEL: @lowmask_add_zext(
; CHECK-NEXT:    [[Y_TR:%.*]] = trunc i32 [[Y:%.*]] to i8
; CHECK-NEXT:    [[BO_NARROW:%.*]] = add i8 [[Y_TR]], [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = zext i8 [[BO_NARROW]] to i32
; CHECK-NEXT:    ret i32 [[R]]
;
  %zx = zext i8 %x to i32
  %bo = add i32 %zx, %y
  %r = and i32 %bo, 255
  ret i32 %r
}

define i32 @lowmask_add_zext_commute(i16 %x, i32 %p) {
; CHECK-LABEL: @lowmask_add_zext_commute(
; CHECK-NEXT:    [[Y:%.*]] = mul i32 [[P:%.*]], [[P]]
; CHECK-NEXT:    [[Y_TR:%.*]] = trunc i32 [[Y]] to i16
; CHECK-NEXT:    [[BO_NARROW:%.*]] = add i16 [[Y_TR]], [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = zext i16 [[BO_NARROW]] to i32
; CHECK-NEXT:    ret i32 [[R]]
;
  %y = mul i32 %p, %p ; thwart complexity-based canonicalization
  %zx = zext i16 %x to i32
  %bo = add i32 %y, %zx
  %r = and i32 %bo, 65535
  ret i32 %r
}

; negative test - the mask constant must match the zext source type

define i32 @lowmask_add_zext_wrong_mask(i8 %x, i32 %y) {
; CHECK-LABEL: @lowmask_add_zext_wrong_mask(
; CHECK-NEXT:    [[ZX:%.*]] = zext i8 [[X:%.*]] to i32
; CHECK-NEXT:    [[BO:%.*]] = add i32 [[ZX]], [[Y:%.*]]
; CHECK-NEXT:    [[R:%.*]] = and i32 [[BO]], 511
; CHECK-NEXT:    ret i32 [[R]]
;
  %zx = zext i8 %x to i32
  %bo = add i32 %zx, %y
  %r = and i32 %bo, 511
  ret i32 %r
}

; negative test - extra use

define i32 @lowmask_add_zext_use1(i8 %x, i32 %y) {
; CHECK-LABEL: @lowmask_add_zext_use1(
; CHECK-NEXT:    [[ZX:%.*]] = zext i8 [[X:%.*]] to i32
; CHECK-NEXT:    call void @use32(i32 [[ZX]])
; CHECK-NEXT:    [[BO:%.*]] = add i32 [[ZX]], [[Y:%.*]]
; CHECK-NEXT:    [[R:%.*]] = and i32 [[BO]], 255
; CHECK-NEXT:    ret i32 [[R]]
;
  %zx = zext i8 %x to i32
  call void @use32(i32 %zx)
  %bo = add i32 %zx, %y
  %r = and i32 %bo, 255
  ret i32 %r
}

; negative test - extra use

define i32 @lowmask_add_zext_use2(i8 %x, i32 %y) {
; CHECK-LABEL: @lowmask_add_zext_use2(
; CHECK-NEXT:    [[ZX:%.*]] = zext i8 [[X:%.*]] to i32
; CHECK-NEXT:    [[BO:%.*]] = add i32 [[ZX]], [[Y:%.*]]
; CHECK-NEXT:    call void @use32(i32 [[BO]])
; CHECK-NEXT:    [[R:%.*]] = and i32 [[BO]], 255
; CHECK-NEXT:    ret i32 [[R]]
;
  %zx = zext i8 %x to i32
  %bo = add i32 %zx, %y
  call void @use32(i32 %bo)
  %r = and i32 %bo, 255
  ret i32 %r
}

; vector splats work too

define <2 x i32> @lowmask_sub_zext(<2 x i4> %x, <2 x i32> %y) {
; CHECK-LABEL: @lowmask_sub_zext(
; CHECK-NEXT:    [[Y_TR:%.*]] = trunc <2 x i32> [[Y:%.*]] to <2 x i4>
; CHECK-NEXT:    [[BO_NARROW:%.*]] = sub <2 x i4> [[X:%.*]], [[Y_TR]]
; CHECK-NEXT:    [[R:%.*]] = zext <2 x i4> [[BO_NARROW]] to <2 x i32>
; CHECK-NEXT:    ret <2 x i32> [[R]]
;
  %zx = zext <2 x i4> %x to <2 x i32>
  %bo = sub <2 x i32> %zx, %y
  %r = and <2 x i32> %bo, <i32 15, i32 15>
  ret <2 x i32> %r
}

; weird types are allowed

define i17 @lowmask_sub_zext_commute(i5 %x, i17 %y) {
; CHECK-LABEL: @lowmask_sub_zext_commute(
; CHECK-NEXT:    [[Y_TR:%.*]] = trunc i17 [[Y:%.*]] to i5
; CHECK-NEXT:    [[BO_NARROW:%.*]] = sub i5 [[Y_TR]], [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = zext i5 [[BO_NARROW]] to i17
; CHECK-NEXT:    ret i17 [[R]]
;
  %zx = zext i5 %x to i17
  %bo = sub i17 %y, %zx
  %r = and i17 %bo, 31
  ret i17 %r
}

define i32 @lowmask_mul_zext(i8 %x, i32 %y) {
; CHECK-LABEL: @lowmask_mul_zext(
; CHECK-NEXT:    [[Y_TR:%.*]] = trunc i32 [[Y:%.*]] to i8
; CHECK-NEXT:    [[BO_NARROW:%.*]] = mul i8 [[Y_TR]], [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = zext i8 [[BO_NARROW]] to i32
; CHECK-NEXT:    ret i32 [[R]]
;
  %zx = zext i8 %x to i32
  %bo = mul i32 %zx, %y
  %r = and i32 %bo, 255
  ret i32 %r
}

define i32 @lowmask_xor_zext_commute(i8 %x, i32 %p) {
; CHECK-LABEL: @lowmask_xor_zext_commute(
; CHECK-NEXT:    [[Y:%.*]] = mul i32 [[P:%.*]], [[P]]
; CHECK-NEXT:    [[Y_TR:%.*]] = trunc i32 [[Y]] to i8
; CHECK-NEXT:    [[BO_NARROW:%.*]] = xor i8 [[Y_TR]], [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = zext i8 [[BO_NARROW]] to i32
; CHECK-NEXT:    ret i32 [[R]]
;
  %y = mul i32 %p, %p ; thwart complexity-based canonicalization
  %zx = zext i8 %x to i32
  %bo = xor i32 %y, %zx
  %r = and i32 %bo, 255
  ret i32 %r
}

define i24 @lowmask_or_zext_commute(i16 %x, i24 %y) {
; CHECK-LABEL: @lowmask_or_zext_commute(
; CHECK-NEXT:    [[Y_TR:%.*]] = trunc i24 [[Y:%.*]] to i16
; CHECK-NEXT:    [[BO_NARROW:%.*]] = or i16 [[Y_TR]], [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = zext i16 [[BO_NARROW]] to i24
; CHECK-NEXT:    ret i24 [[R]]
;
  %zx = zext i16 %x to i24
  %bo = or i24 %y, %zx
  %r = and i24 %bo, 65535
  ret i24 %r
}

define i32 @test40(i1 %C) {
; CHECK-LABEL: @test40(
; CHECK-NEXT:    [[A:%.*]] = select i1 [[C:%.*]], i32 104, i32 10
; CHECK-NEXT:    ret i32 [[A]]
;
  %A = select i1 %C, i32 1000, i32 10
  %V = and i32 %A, 123
  ret i32 %V
}

define <2 x i32> @test40vec(i1 %C) {
; CHECK-LABEL: @test40vec(
; CHECK-NEXT:    [[A:%.*]] = select i1 [[C:%.*]], <2 x i32> <i32 104, i32 104>, <2 x i32> <i32 10, i32 10>
; CHECK-NEXT:    ret <2 x i32> [[A]]
;
  %A = select i1 %C, <2 x i32> <i32 1000, i32 1000>, <2 x i32> <i32 10, i32 10>
  %V = and <2 x i32> %A, <i32 123, i32 123>
  ret <2 x i32> %V
}

define <2 x i32> @test40vec2(i1 %C) {
; CHECK-LABEL: @test40vec2(
; CHECK-NEXT:    [[V:%.*]] = select i1 [[C:%.*]], <2 x i32> <i32 104, i32 324>, <2 x i32> <i32 10, i32 12>
; CHECK-NEXT:    ret <2 x i32> [[V]]
;
  %A = select i1 %C, <2 x i32> <i32 1000, i32 2500>, <2 x i32> <i32 10, i32 30>
  %V = and <2 x i32> %A, <i32 123, i32 333>
  ret <2 x i32> %V
}

define i32 @test41(i1 %which) {
; CHECK-LABEL: @test41(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
; CHECK:       delay:
; CHECK-NEXT:    br label [[FINAL]]
; CHECK:       final:
; CHECK-NEXT:    [[A:%.*]] = phi i32 [ 104, [[ENTRY:%.*]] ], [ 10, [[DELAY]] ]
; CHECK-NEXT:    ret i32 [[A]]
;
entry:
  br i1 %which, label %final, label %delay

delay:
  br label %final

final:
  %A = phi i32 [ 1000, %entry ], [ 10, %delay ]
  %value = and i32 %A, 123
  ret i32 %value
}

define <2 x i32> @test41vec(i1 %which) {
; CHECK-LABEL: @test41vec(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
; CHECK:       delay:
; CHECK-NEXT:    br label [[FINAL]]
; CHECK:       final:
; CHECK-NEXT:    [[A:%.*]] = phi <2 x i32> [ <i32 104, i32 104>, [[ENTRY:%.*]] ], [ <i32 10, i32 10>, [[DELAY]] ]
; CHECK-NEXT:    ret <2 x i32> [[A]]
;
entry:
  br i1 %which, label %final, label %delay

delay:
  br label %final

final:
  %A = phi <2 x i32> [ <i32 1000, i32 1000>, %entry ], [ <i32 10, i32 10>, %delay ]
  %value = and <2 x i32> %A, <i32 123, i32 123>
  ret <2 x i32> %value
}

define <2 x i32> @test41vec2(i1 %which) {
; CHECK-LABEL: @test41vec2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[WHICH:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
; CHECK:       delay:
; CHECK-NEXT:    br label [[FINAL]]
; CHECK:       final:
; CHECK-NEXT:    [[A:%.*]] = phi <2 x i32> [ <i32 104, i32 324>, [[ENTRY:%.*]] ], [ <i32 10, i32 12>, [[DELAY]] ]
; CHECK-NEXT:    ret <2 x i32> [[A]]
;
entry:
  br i1 %which, label %final, label %delay

delay:
  br label %final

final:
  %A = phi <2 x i32> [ <i32 1000, i32 2500>, %entry ], [ <i32 10, i32 30>, %delay ]
  %value = and <2 x i32> %A, <i32 123, i32 333>
  ret <2 x i32> %value
}

define i32 @test42(i32 %a, i32 %c, i32 %d) {
; CHECK-LABEL: @test42(
; CHECK-NEXT:    [[FORCE:%.*]] = mul i32 [[C:%.*]], [[D:%.*]]
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[FORCE]], [[A:%.*]]
; CHECK-NEXT:    ret i32 [[AND]]
;
  %force = mul i32 %c, %d ; forces the complexity sorting
  %or = or i32 %a, %force
  %nota = xor i32 %a, -1
  %xor = xor i32 %nota, %force
  %and = and i32 %xor, %or
  ret i32 %and
}

define i32 @test43(i32 %a, i32 %c, i32 %d) {
; CHECK-LABEL: @test43(
; CHECK-NEXT:    [[FORCE:%.*]] = mul i32 [[C:%.*]], [[D:%.*]]
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[FORCE]], [[A:%.*]]
; CHECK-NEXT:    ret i32 [[AND]]
;
  %force = mul i32 %c, %d ; forces the complexity sorting
  %or = or i32 %a, %force
  %nota = xor i32 %a, -1
  %xor = xor i32 %nota, %force
  %and = and i32 %or, %xor
  ret i32 %and
}

; (~y | x) & y -> x & y
define i32 @test44(i32 %x, i32 %y) nounwind {
; CHECK-LABEL: @test44(
; CHECK-NEXT:    [[A:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    ret i32 [[A]]
;
  %n = xor i32 %y, -1
  %o = or i32 %n, %x
  %a = and i32 %o, %y
  ret i32 %a
}

; (x | ~y) & y -> x & y
define i32 @test45(i32 %x, i32 %y) nounwind {
; CHECK-LABEL: @test45(
; CHECK-NEXT:    [[A:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    ret i32 [[A]]
;
  %n = xor i32 %y, -1
  %o = or i32 %x, %n
  %a = and i32 %o, %y
  ret i32 %a
}

; y & (~y | x) -> y | x
define i32 @test46(i32 %x, i32 %y) nounwind {
; CHECK-LABEL: @test46(
; CHECK-NEXT:    [[A:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    ret i32 [[A]]
;
  %n = xor i32 %y, -1
  %o = or i32 %n, %x
  %a = and i32 %y, %o
  ret i32 %a
}

; y & (x | ~y) -> y | x
define i32 @test47(i32 %x, i32 %y) nounwind {
; CHECK-LABEL: @test47(
; CHECK-NEXT:    [[A:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    ret i32 [[A]]
;
  %n = xor i32 %y, -1
  %o = or i32 %x, %n
  %a = and i32 %y, %o
  ret i32 %a
}

; In the next 4 tests, vary the types and predicates for extra coverage.
; (X & (Y | ~X)) -> (X & Y), where 'not' is an inverted cmp

define i1 @and_orn_cmp_1(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @and_orn_cmp_1(
; CHECK-NEXT:    [[X:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i32 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X]], [[Y]]
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp sgt i32 %a, %b
  %x_inv = icmp sle i32 %a, %b
  %y = icmp ugt i32 %c, 42      ; thwart complexity-based ordering
  %or = or i1 %y, %x_inv
  %and = and i1 %x, %or
  ret i1 %and
}

define i1 @and_orn_cmp_1_logical(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @and_orn_cmp_1_logical(
; CHECK-NEXT:    [[X:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i32 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[X]], i1 [[Y]], i1 false
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp sgt i32 %a, %b
  %x_inv = icmp sle i32 %a, %b
  %y = icmp ugt i32 %c, 42      ; thwart complexity-based ordering
  %or = select i1 %y, i1 true, i1 %x_inv
  %and = select i1 %x, i1 %or, i1 false
  ret i1 %and
}

; Commute the 'and':
; ((Y | ~X) & X) -> (X & Y), where 'not' is an inverted cmp

define <2 x i1> @and_orn_cmp_2(<2 x i32> %a, <2 x i32> %b, <2 x i32> %c) {
; CHECK-LABEL: @and_orn_cmp_2(
; CHECK-NEXT:    [[X:%.*]] = icmp sge <2 x i32> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt <2 x i32> [[C:%.*]], <i32 42, i32 47>
; CHECK-NEXT:    [[AND:%.*]] = and <2 x i1> [[Y]], [[X]]
; CHECK-NEXT:    ret <2 x i1> [[AND]]
;
  %x = icmp sge <2 x i32> %a, %b
  %x_inv = icmp slt <2 x i32> %a, %b
  %y = icmp ugt <2 x i32> %c, <i32 42, i32 47>      ; thwart complexity-based ordering
  %or = or <2 x i1> %y, %x_inv
  %and = and <2 x i1> %or, %x
  ret <2 x i1> %and
}

; Commute the 'or':
; (X & (~X | Y)) -> (X & Y), where 'not' is an inverted cmp

define i1 @and_orn_cmp_3(i72 %a, i72 %b, i72 %c) {
; CHECK-LABEL: @and_orn_cmp_3(
; CHECK-NEXT:    [[X:%.*]] = icmp ugt i72 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i72 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X]], [[Y]]
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp ugt i72 %a, %b
  %x_inv = icmp ule i72 %a, %b
  %y = icmp ugt i72 %c, 42      ; thwart complexity-based ordering
  %or = or i1 %x_inv, %y
  %and = and i1 %x, %or
  ret i1 %and
}

define i1 @and_orn_cmp_3_logical(i72 %a, i72 %b, i72 %c) {
; CHECK-LABEL: @and_orn_cmp_3_logical(
; CHECK-NEXT:    [[X:%.*]] = icmp ugt i72 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i72 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[X]], i1 [[Y]], i1 false
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp ugt i72 %a, %b
  %x_inv = icmp ule i72 %a, %b
  %y = icmp ugt i72 %c, 42      ; thwart complexity-based ordering
  %or = select i1 %x_inv, i1 true, i1 %y
  %and = select i1 %x, i1 %or, i1 false
  ret i1 %and
}

; Commute the 'and':
; ((~X | Y) & X) -> (X & Y), where 'not' is an inverted cmp

define <3 x i1> @or_andn_cmp_4(<3 x i32> %a, <3 x i32> %b, <3 x i32> %c) {
; CHECK-LABEL: @or_andn_cmp_4(
; CHECK-NEXT:    [[X:%.*]] = icmp eq <3 x i32> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt <3 x i32> [[C:%.*]], <i32 42, i32 43, i32 -1>
; CHECK-NEXT:    [[AND:%.*]] = and <3 x i1> [[Y]], [[X]]
; CHECK-NEXT:    ret <3 x i1> [[AND]]
;
  %x = icmp eq <3 x i32> %a, %b
  %x_inv = icmp ne <3 x i32> %a, %b
  %y = icmp ugt <3 x i32> %c, <i32 42, i32 43, i32 -1>      ; thwart complexity-based ordering
  %or = or <3 x i1> %x_inv, %y
  %and = and <3 x i1> %or, %x
  ret <3 x i1> %and
}

; In the next 4 tests, vary the types and predicates for extra coverage.
; (~X & (Y | X)) -> (~X & Y), where 'not' is an inverted cmp

define i1 @andn_or_cmp_1(i37 %a, i37 %b, i37 %c) {
; CHECK-LABEL: @andn_or_cmp_1(
; CHECK-NEXT:    [[X_INV:%.*]] = icmp sle i37 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i37 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X_INV]], [[Y]]
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp sgt i37 %a, %b
  %x_inv = icmp sle i37 %a, %b
  %y = icmp ugt i37 %c, 42      ; thwart complexity-based ordering
  %or = or i1 %y, %x
  %and = and i1 %x_inv, %or
  ret i1 %and
}

define i1 @andn_or_cmp_1_logical(i37 %a, i37 %b, i37 %c) {
; CHECK-LABEL: @andn_or_cmp_1_logical(
; CHECK-NEXT:    [[X_INV:%.*]] = icmp sle i37 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i37 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[X_INV]], i1 [[Y]], i1 false
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp sgt i37 %a, %b
  %x_inv = icmp sle i37 %a, %b
  %y = icmp ugt i37 %c, 42      ; thwart complexity-based ordering
  %or = select i1 %y, i1 true, i1 %x
  %and = select i1 %x_inv, i1 %or, i1 false
  ret i1 %and
}

; Commute the 'and':
; ((Y | X) & ~X) -> (~X & Y), where 'not' is an inverted cmp

define i1 @andn_or_cmp_2(i16 %a, i16 %b, i16 %c) {
; CHECK-LABEL: @andn_or_cmp_2(
; CHECK-NEXT:    [[X_INV:%.*]] = icmp slt i16 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i16 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[Y]], [[X_INV]]
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp sge i16 %a, %b
  %x_inv = icmp slt i16 %a, %b
  %y = icmp ugt i16 %c, 42      ; thwart complexity-based ordering
  %or = or i1 %y, %x
  %and = and i1 %or, %x_inv
  ret i1 %and
}

define i1 @andn_or_cmp_2_logical(i16 %a, i16 %b, i16 %c) {
; CHECK-LABEL: @andn_or_cmp_2_logical(
; CHECK-NEXT:    [[X_INV:%.*]] = icmp slt i16 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i16 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[Y]], i1 [[X_INV]], i1 false
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp sge i16 %a, %b
  %x_inv = icmp slt i16 %a, %b
  %y = icmp ugt i16 %c, 42      ; thwart complexity-based ordering
  %or = select i1 %y, i1 true, i1 %x
  %and = select i1 %or, i1 %x_inv, i1 false
  ret i1 %and
}

; Commute the 'or':
; (~X & (X | Y)) -> (~X & Y), where 'not' is an inverted cmp

define <4 x i1> @andn_or_cmp_3(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
; CHECK-LABEL: @andn_or_cmp_3(
; CHECK-NEXT:    [[X_INV:%.*]] = icmp ule <4 x i32> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt <4 x i32> [[C:%.*]], <i32 42, i32 0, i32 1, i32 -1>
; CHECK-NEXT:    [[AND:%.*]] = and <4 x i1> [[X_INV]], [[Y]]
; CHECK-NEXT:    ret <4 x i1> [[AND]]
;
  %x = icmp ugt <4 x i32> %a, %b
  %x_inv = icmp ule <4 x i32> %a, %b
  %y = icmp ugt <4 x i32> %c, <i32 42, i32 0, i32 1, i32 -1>      ; thwart complexity-based ordering
  %or = or <4 x i1> %x, %y
  %and = and <4 x i1> %x_inv, %or
  ret <4 x i1> %and
}

; Commute the 'and':
; ((X | Y) & ~X) -> (~X & Y), where 'not' is an inverted cmp

define i1 @andn_or_cmp_4(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @andn_or_cmp_4(
; CHECK-NEXT:    [[X_INV:%.*]] = icmp ne i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i32 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[Y]], [[X_INV]]
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp eq i32 %a, %b
  %x_inv = icmp ne i32 %a, %b
  %y = icmp ugt i32 %c, 42      ; thwart complexity-based ordering
  %or = or i1 %x, %y
  %and = and i1 %or, %x_inv
  ret i1 %and
}

define i1 @andn_or_cmp_4_logical(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @andn_or_cmp_4_logical(
; CHECK-NEXT:    [[X_INV:%.*]] = icmp ne i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i32 [[C:%.*]], 42
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[X_INV]], i1 [[Y]], i1 false
; CHECK-NEXT:    ret i1 [[AND]]
;
  %x = icmp eq i32 %a, %b
  %x_inv = icmp ne i32 %a, %b
  %y = icmp ugt i32 %c, 42      ; thwart complexity-based ordering
  %or = select i1 %x, i1 true, i1 %y
  %and = select i1 %or, i1 %x_inv, i1 false
  ret i1 %and
}

define i32 @lowbitmask_casted_shift(i8 %x) {
; CHECK-LABEL: @lowbitmask_casted_shift(
; CHECK-NEXT:    [[TMP1:%.*]] = sext i8 [[X:%.*]] to i32
; CHECK-NEXT:    [[R:%.*]] = lshr i32 [[TMP1]], 1
; CHECK-NEXT:    ret i32 [[R]]
;
  %a = ashr i8 %x, 1
  %s = sext i8 %a to i32
  %r = and i32 %s, 2147483647
  ret i32 %r
}

; Negative test - mask constant is too big.

define i32 @lowbitmask_casted_shift_wrong_mask1(i8 %x) {
; CHECK-LABEL: @lowbitmask_casted_shift_wrong_mask1(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 2
; CHECK-NEXT:    [[S:%.*]] = sext i8 [[A]] to i32
; CHECK-NEXT:    [[R:%.*]] = and i32 [[S]], 2147483647
; CHECK-NEXT:    ret i32 [[R]]
;
  %a = ashr i8 %x, 2
  %s = sext i8 %a to i32
  %r = and i32 %s, 2147483647 ; 0x7fffffff
  ret i32 %r
}

; Negative test - mask constant is too small.

define i32 @lowbitmask_casted_shift_wrong_mask2(i8 %x) {
; CHECK-LABEL: @lowbitmask_casted_shift_wrong_mask2(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 2
; CHECK-NEXT:    [[S:%.*]] = sext i8 [[A]] to i32
; CHECK-NEXT:    [[R:%.*]] = and i32 [[S]], 536870911
; CHECK-NEXT:    ret i32 [[R]]
;
  %a = ashr i8 %x, 2
  %s = sext i8 %a to i32
  %r = and i32 %s, 536870911  ; 0x1fffffff
  ret i32 %r
}

; Extra use of shift is ok.

define i32 @lowbitmask_casted_shift_use1(i8 %x) {
; CHECK-LABEL: @lowbitmask_casted_shift_use1(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 3
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    [[TMP1:%.*]] = sext i8 [[X]] to i32
; CHECK-NEXT:    [[R:%.*]] = lshr i32 [[TMP1]], 3
; CHECK-NEXT:    ret i32 [[R]]
;
  %a = ashr i8 %x, 3
  call void @use8(i8 %a)
  %s = sext i8 %a to i32
  %r = and i32 %s, 536870911
  ret i32 %r
}

; Negative test - extra use of sext requires more instructions.

define i32 @lowbitmask_casted_shift_use2(i8 %x) {
; CHECK-LABEL: @lowbitmask_casted_shift_use2(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 3
; CHECK-NEXT:    [[S:%.*]] = sext i8 [[A]] to i32
; CHECK-NEXT:    call void @use32(i32 [[S]])
; CHECK-NEXT:    [[R:%.*]] = and i32 [[S]], 536870911
; CHECK-NEXT:    ret i32 [[R]]
;
  %a = ashr i8 %x, 3
  %s = sext i8 %a to i32
  call void @use32(i32 %s)
  %r = and i32 %s, 536870911
  ret i32 %r
}

; Vectors/weird types are ok.

define <2 x i59> @lowbitmask_casted_shift_vec_splat(<2 x i47> %x) {
; CHECK-LABEL: @lowbitmask_casted_shift_vec_splat(
; CHECK-NEXT:    [[TMP1:%.*]] = sext <2 x i47> [[X:%.*]] to <2 x i59>
; CHECK-NEXT:    [[R:%.*]] = lshr <2 x i59> [[TMP1]], <i59 5, i59 5>
; CHECK-NEXT:    ret <2 x i59> [[R]]
;
  %a = ashr <2 x i47> %x, <i47 5, i47 5>
  %s = sext <2 x i47> %a to <2 x i59>
  %r = and <2 x i59> %s, <i59 18014398509481983, i59 18014398509481983>  ;  -1 u>> 5 == 0x3f_ffff_ffff_ffff
  ret <2 x i59> %r
}

define i32 @lowmask_sext_in_reg(i32 %x) {
; CHECK-LABEL: @lowmask_sext_in_reg(
; CHECK-NEXT:    [[L:%.*]] = shl i32 [[X:%.*]], 20
; CHECK-NEXT:    [[R:%.*]] = ashr exact i32 [[L]], 20
; CHECK-NEXT:    call void @use32(i32 [[R]])
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[X]], 4095
; CHECK-NEXT:    ret i32 [[AND]]
;
  %l = shl i32 %x, 20
  %r = ashr i32 %l, 20
  call void @use32(i32 %r)
  %and = and i32 %r, 4095
  ret i32 %and
}

; Mismatched shift amounts, but the mask op can be replaced by a shift.

define i32 @lowmask_not_sext_in_reg(i32 %x) {
; CHECK-LABEL: @lowmask_not_sext_in_reg(
; CHECK-NEXT:    [[L:%.*]] = shl i32 [[X:%.*]], 19
; CHECK-NEXT:    [[R:%.*]] = ashr i32 [[L]], 20
; CHECK-NEXT:    call void @use32(i32 [[R]])
; CHECK-NEXT:    [[AND:%.*]] = lshr i32 [[L]], 20
; CHECK-NEXT:    ret i32 [[AND]]
;
  %l = shl i32 %x, 19
  %r = ashr i32 %l, 20
  call void @use32(i32 %r)
  %and = and i32 %r, 4095
  ret i32 %and
}

; Negative test - too much shift for mask

define i32 @not_lowmask_sext_in_reg(i32 %x) {
; CHECK-LABEL: @not_lowmask_sext_in_reg(
; CHECK-NEXT:    [[L:%.*]] = shl i32 [[X:%.*]], 20
; CHECK-NEXT:    [[R:%.*]] = ashr exact i32 [[L]], 20
; CHECK-NEXT:    call void @use32(i32 [[R]])
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[R]], 4096
; CHECK-NEXT:    ret i32 [[AND]]
;
  %l = shl i32 %x, 20
  %r = ashr i32 %l, 20
  call void @use32(i32 %r)
  %and = and i32 %r, 4096
  ret i32 %and
}

; Negative test - too much shift for mask

define i32 @not_lowmask_sext_in_reg2(i32 %x) {
; CHECK-LABEL: @not_lowmask_sext_in_reg2(
; CHECK-NEXT:    [[L:%.*]] = shl i32 [[X:%.*]], 21
; CHECK-NEXT:    [[R:%.*]] = ashr exact i32 [[L]], 21
; CHECK-NEXT:    call void @use32(i32 [[R]])
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[R]], 4095
; CHECK-NEXT:    ret i32 [[AND]]
;
  %l = shl i32 %x, 21
  %r = ashr i32 %l, 21
  call void @use32(i32 %r)
  %and = and i32 %r, 4095
  ret i32 %and
}

define <2 x i32> @lowmask_sext_in_reg_splat(<2 x i32> %x, ptr %p) {
; CHECK-LABEL: @lowmask_sext_in_reg_splat(
; CHECK-NEXT:    [[L:%.*]] = shl <2 x i32> [[X:%.*]], <i32 20, i32 20>
; CHECK-NEXT:    [[R:%.*]] = ashr exact <2 x i32> [[L]], <i32 20, i32 20>
; CHECK-NEXT:    store <2 x i32> [[R]], ptr [[P:%.*]], align 8
; CHECK-NEXT:    [[AND:%.*]] = and <2 x i32> [[X]], <i32 4095, i32 4095>
; CHECK-NEXT:    ret <2 x i32> [[AND]]
;
  %l = shl <2 x i32> %x, <i32 20, i32 20>
  %r = ashr <2 x i32> %l, <i32 20, i32 20>
  store <2 x i32> %r, ptr %p
  %and = and <2 x i32> %r, <i32 4095, i32 4095>
  ret <2 x i32> %and
}

define i8 @lowmask_add(i8 %x) {
; CHECK-LABEL: @lowmask_add(
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], -64
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    [[R:%.*]] = and i8 [[X]], 32
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = add i8 %x, -64 ; 0xc0
  call void @use8(i8 %a)
  %r = and i8 %a, 32 ; 0x20
  ret i8 %r
}

define i8 @lowmask_add_2(i8 %x) {
; CHECK-LABEL: @lowmask_add_2(
; CHECK-NEXT:    [[R:%.*]] = and i8 [[X:%.*]], 63
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = add i8 %x, -64 ; 0xc0
  %r = and i8 %a, 63 ; 0x3f
  ret i8 %r
}

define i8 @lowmask_add_2_uses(i8 %x) {
; CHECK-LABEL: @lowmask_add_2_uses(
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], -64
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    [[R:%.*]] = and i8 [[X]], 63
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = add i8 %x, -64 ; 0xc0
  call void @use8(i8 %a)
  %r = and i8 %a, 63 ; 0x3f
  ret i8 %r
}

define <2 x i8> @lowmask_add_2_splat(<2 x i8> %x, ptr %p) {
; CHECK-LABEL: @lowmask_add_2_splat(
; CHECK-NEXT:    [[A:%.*]] = add <2 x i8> [[X:%.*]], <i8 -64, i8 -64>
; CHECK-NEXT:    store <2 x i8> [[A]], ptr [[P:%.*]], align 2
; CHECK-NEXT:    [[R:%.*]] = and <2 x i8> [[X]], <i8 63, i8 63>
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %a = add <2 x i8> %x, <i8 -64, i8 -64> ; 0xc0
  store <2 x i8> %a, ptr %p
  %r = and <2 x i8> %a, <i8 63, i8 63> ; 0x3f
  ret <2 x i8> %r
}

; Negative test - mask overlaps low bit of add

define i8 @not_lowmask_add(i8 %x) {
; CHECK-LABEL: @not_lowmask_add(
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], -64
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    [[R:%.*]] = and i8 [[A]], 64
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = add i8 %x, -64 ; 0xc0
  call void @use8(i8 %a)
  %r = and i8 %a, 64 ; 0x40
  ret i8 %r
}

; Negative test - mask overlaps low bit of add

define i8 @not_lowmask_add2(i8 %x) {
; CHECK-LABEL: @not_lowmask_add2(
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], -96
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    [[R:%.*]] = and i8 [[A]], 63
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = add i8 %x, -96 ; 0xe0
  call void @use8(i8 %a)
  %r = and i8 %a, 63 ; 0x3f
  ret i8 %r
}

define <2 x i8> @lowmask_add_splat(<2 x i8> %x, ptr %p) {
; CHECK-LABEL: @lowmask_add_splat(
; CHECK-NEXT:    [[A:%.*]] = add <2 x i8> [[X:%.*]], <i8 -64, i8 -64>
; CHECK-NEXT:    store <2 x i8> [[A]], ptr [[P:%.*]], align 2
; CHECK-NEXT:    [[R:%.*]] = and <2 x i8> [[X]], <i8 32, i8 32>
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %a = add <2 x i8> %x, <i8 -64, i8 -64> ; 0xc0
  store <2 x i8> %a, ptr %p
  %r = and <2 x i8> %a, <i8 32, i8 32> ; 0x20
  ret <2 x i8> %r
}

define <2 x i8> @lowmask_add_splat_undef(<2 x i8> %x, ptr %p) {
; CHECK-LABEL: @lowmask_add_splat_undef(
; CHECK-NEXT:    [[A:%.*]] = add <2 x i8> [[X:%.*]], <i8 -64, i8 undef>
; CHECK-NEXT:    store <2 x i8> [[A]], ptr [[P:%.*]], align 2
; CHECK-NEXT:    [[R:%.*]] = and <2 x i8> [[A]], <i8 undef, i8 32>
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %a = add <2 x i8> %x, <i8 -64, i8 undef> ; 0xc0
  store <2 x i8> %a, ptr %p
  %r = and <2 x i8> %a, <i8 undef, i8 32> ; 0x20
  ret <2 x i8> %r
}

define <2 x i8> @lowmask_add_vec(<2 x i8> %x, ptr %p) {
; CHECK-LABEL: @lowmask_add_vec(
; CHECK-NEXT:    [[A:%.*]] = add <2 x i8> [[X:%.*]], <i8 -96, i8 -64>
; CHECK-NEXT:    store <2 x i8> [[A]], ptr [[P:%.*]], align 2
; CHECK-NEXT:    [[R:%.*]] = and <2 x i8> [[A]], <i8 16, i8 32>
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %a = add <2 x i8> %x, <i8 -96, i8 -64> ; 0xe0, 0xc0
  store <2 x i8> %a, ptr %p
  %r = and <2 x i8> %a, <i8 16, i8 32> ; 0x10, 0x20
  ret <2 x i8> %r
}

; Only one bit set
define i8 @flip_masked_bit(i8 %A) {
; CHECK-LABEL: @flip_masked_bit(
; CHECK-NEXT:    [[TMP1:%.*]] = and i8 [[A:%.*]], 16
; CHECK-NEXT:    [[C:%.*]] = xor i8 [[TMP1]], 16
; CHECK-NEXT:    ret i8 [[C]]
;
  %B = add i8 %A, 16
  %C = and i8 %B, 16
  ret i8 %C
}

define <2 x i8> @flip_masked_bit_uniform(<2 x i8> %A) {
; CHECK-LABEL: @flip_masked_bit_uniform(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[A:%.*]], <i8 16, i8 16>
; CHECK-NEXT:    [[C:%.*]] = xor <2 x i8> [[TMP1]], <i8 16, i8 16>
; CHECK-NEXT:    ret <2 x i8> [[C]]
;
  %B = add <2 x i8> %A, <i8 16, i8 16>
  %C = and <2 x i8> %B, <i8 16, i8 16>
  ret <2 x i8> %C
}

define <2 x i8> @flip_masked_bit_undef(<2 x i8> %A) {
; CHECK-LABEL: @flip_masked_bit_undef(
; CHECK-NEXT:    [[B:%.*]] = add <2 x i8> [[A:%.*]], <i8 16, i8 undef>
; CHECK-NEXT:    [[C:%.*]] = and <2 x i8> [[B]], <i8 16, i8 undef>
; CHECK-NEXT:    ret <2 x i8> [[C]]
;
  %B = add <2 x i8> %A, <i8 16, i8 undef>
  %C = and <2 x i8> %B, <i8 16, i8 undef>
  ret <2 x i8> %C
}

define <2 x i8> @flip_masked_bit_nonuniform(<2 x i8> %A) {
; CHECK-LABEL: @flip_masked_bit_nonuniform(
; CHECK-NEXT:    [[B:%.*]] = add <2 x i8> [[A:%.*]], <i8 16, i8 4>
; CHECK-NEXT:    [[C:%.*]] = and <2 x i8> [[B]], <i8 16, i8 4>
; CHECK-NEXT:    ret <2 x i8> [[C]]
;
  %B = add <2 x i8> %A, <i8 16, i8 4>
  %C = and <2 x i8> %B, <i8 16, i8 4>
  ret <2 x i8> %C
}

define i8 @ashr_bitwidth_mask(i8 %x, i8 %y) {
; CHECK-LABEL: @ashr_bitwidth_mask(
; CHECK-NEXT:    [[ISNEG:%.*]] = icmp slt i8 [[X:%.*]], 0
; CHECK-NEXT:    [[NEG_OR_ZERO:%.*]] = select i1 [[ISNEG]], i8 [[Y:%.*]], i8 0
; CHECK-NEXT:    ret i8 [[NEG_OR_ZERO]]
;
  %sign = ashr i8 %x, 7
  %neg_or_zero = and i8 %sign, %y
  ret i8 %neg_or_zero
}

define <2 x i8> @ashr_bitwidth_mask_vec_commute(<2 x i8> %x, <2 x i8> %py) {
; CHECK-LABEL: @ashr_bitwidth_mask_vec_commute(
; CHECK-NEXT:    [[Y:%.*]] = mul <2 x i8> [[PY:%.*]], <i8 42, i8 2>
; CHECK-NEXT:    [[ISNEG:%.*]] = icmp slt <2 x i8> [[X:%.*]], zeroinitializer
; CHECK-NEXT:    [[NEG_OR_ZERO:%.*]] = select <2 x i1> [[ISNEG]], <2 x i8> [[Y]], <2 x i8> zeroinitializer
; CHECK-NEXT:    ret <2 x i8> [[NEG_OR_ZERO]]
;
  %y = mul <2 x i8> %py, <i8 42, i8 2>      ; thwart complexity-based ordering
  %sign = ashr <2 x i8> %x, <i8 7, i8 7>
  %neg_or_zero = and <2 x i8> %y, %sign
  ret <2 x i8> %neg_or_zero
}

; negative test - extra use

define i8 @ashr_bitwidth_mask_use(i8 %x, i8 %y) {
; CHECK-LABEL: @ashr_bitwidth_mask_use(
; CHECK-NEXT:    [[SIGN:%.*]] = ashr i8 [[X:%.*]], 7
; CHECK-NEXT:    call void @use8(i8 [[SIGN]])
; CHECK-NEXT:    [[R:%.*]] = and i8 [[SIGN]], [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sign = ashr i8 %x, 7
  call void @use8(i8 %sign)
  %r = and i8 %sign, %y
  ret i8 %r
}

; negative test - wrong shift amount

define i8 @ashr_not_bitwidth_mask(i8 %x, i8 %y) {
; CHECK-LABEL: @ashr_not_bitwidth_mask(
; CHECK-NEXT:    [[SIGN:%.*]] = ashr i8 [[X:%.*]], 6
; CHECK-NEXT:    [[R:%.*]] = and i8 [[SIGN]], [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sign = ashr i8 %x, 6
  %r = and i8 %sign, %y
  ret i8 %r
}

; negative test - wrong shift opcode

define i8 @lshr_bitwidth_mask(i8 %x, i8 %y) {
; CHECK-LABEL: @lshr_bitwidth_mask(
; CHECK-NEXT:    [[SIGN:%.*]] = lshr i8 [[X:%.*]], 7
; CHECK-NEXT:    [[R:%.*]] = and i8 [[SIGN]], [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sign = lshr i8 %x, 7
  %r = and i8 %sign, %y
  ret i8 %r
}

define i16 @signbit_splat_mask(i8 %x, i16 %y) {
; CHECK-LABEL: @signbit_splat_mask(
; CHECK-NEXT:    [[ISNEG:%.*]] = icmp slt i8 [[X:%.*]], 0
; CHECK-NEXT:    [[R:%.*]] = select i1 [[ISNEG]], i16 [[Y:%.*]], i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 7
  %s = sext i8 %a to i16
  %r = and i16 %s, %y
  ret i16 %r
}

define <2 x i16> @signbit_splat_mask_commute(<2 x i5> %x, <2 x i16> %p) {
; CHECK-LABEL: @signbit_splat_mask_commute(
; CHECK-NEXT:    [[Y:%.*]] = mul <2 x i16> [[P:%.*]], [[P]]
; CHECK-NEXT:    [[ISNEG:%.*]] = icmp slt <2 x i5> [[X:%.*]], zeroinitializer
; CHECK-NEXT:    [[R:%.*]] = select <2 x i1> [[ISNEG]], <2 x i16> [[Y]], <2 x i16> zeroinitializer
; CHECK-NEXT:    ret <2 x i16> [[R]]
;
  %y = mul <2 x i16> %p, %p ; thwart complexity-based canonicalization
  %a = ashr <2 x i5> %x, <i5 4, i5 poison>
  %s = sext <2 x i5> %a to <2 x i16>
  %r = and <2 x i16> %y, %s
  ret <2 x i16> %r
}

define i16 @signbit_splat_mask_use1(i8 %x, i16 %y) {
; CHECK-LABEL: @signbit_splat_mask_use1(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 7
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    [[ISNEG:%.*]] = icmp slt i8 [[X]], 0
; CHECK-NEXT:    [[R:%.*]] = select i1 [[ISNEG]], i16 [[Y:%.*]], i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 7
  call void @use8(i8 %a)
  %s = sext i8 %a to i16
  %r = and i16 %s, %y
  ret i16 %r
}

; negative test - extra use

define i16 @signbit_splat_mask_use2(i8 %x, i16 %y) {
; CHECK-LABEL: @signbit_splat_mask_use2(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 7
; CHECK-NEXT:    [[S:%.*]] = sext i8 [[A]] to i16
; CHECK-NEXT:    call void @use16(i16 [[S]])
; CHECK-NEXT:    [[R:%.*]] = and i16 [[S]], [[Y:%.*]]
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 7
  %s = sext i8 %a to i16
  call void @use16(i16 %s)
  %r = and i16 %s, %y
  ret i16 %r
}

; negative test - wrong extend

define i16 @not_signbit_splat_mask1(i8 %x, i16 %y) {
; CHECK-LABEL: @not_signbit_splat_mask1(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 7
; CHECK-NEXT:    [[Z:%.*]] = zext i8 [[A]] to i16
; CHECK-NEXT:    [[R:%.*]] = and i16 [[Z]], [[Y:%.*]]
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 7
  %z = zext i8 %a to i16
  %r = and i16 %z, %y
  ret i16 %r
}

; negative test - wrong shift amount

define i16 @not_signbit_splat_mask2(i8 %x, i16 %y) {
; CHECK-LABEL: @not_signbit_splat_mask2(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 6
; CHECK-NEXT:    [[S:%.*]] = sext i8 [[A]] to i16
; CHECK-NEXT:    [[R:%.*]] = and i16 [[S]], [[Y:%.*]]
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 6
  %s = sext i8 %a to i16
  %r = and i16 %s, %y
  ret i16 %r
}

define i8 @not_ashr_bitwidth_mask(i8 %x, i8 %y) {
; CHECK-LABEL: @not_ashr_bitwidth_mask(
; CHECK-NEXT:    [[ISNOTNEG_INV:%.*]] = icmp slt i8 [[X:%.*]], 0
; CHECK-NEXT:    [[POS_OR_ZERO:%.*]] = select i1 [[ISNOTNEG_INV]], i8 0, i8 [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[POS_OR_ZERO]]
;
  %sign = ashr i8 %x, 7
  %not = xor i8 %sign, -1
  %pos_or_zero = and i8 %not, %y
  ret i8 %pos_or_zero
}

define <2 x i8> @not_ashr_bitwidth_mask_vec_commute(<2 x i8> %x, <2 x i8> %py) {
; CHECK-LABEL: @not_ashr_bitwidth_mask_vec_commute(
; CHECK-NEXT:    [[Y:%.*]] = mul <2 x i8> [[PY:%.*]], <i8 42, i8 2>
; CHECK-NEXT:    [[ISNOTNEG_INV:%.*]] = icmp slt <2 x i8> [[X:%.*]], zeroinitializer
; CHECK-NEXT:    [[POS_OR_ZERO:%.*]] = select <2 x i1> [[ISNOTNEG_INV]], <2 x i8> zeroinitializer, <2 x i8> [[Y]]
; CHECK-NEXT:    ret <2 x i8> [[POS_OR_ZERO]]
;
  %y = mul <2 x i8> %py, <i8 42, i8 2>      ; thwart complexity-based ordering
  %sign = ashr <2 x i8> %x, <i8 7, i8 7>
  %not = xor <2 x i8> %sign, <i8 -1, i8 -1>
  %pos_or_zero = and <2 x i8> %y, %not
  ret <2 x i8> %pos_or_zero
}

; extra use of shift is ok

define i8 @not_ashr_bitwidth_mask_use1(i8 %x, i8 %y) {
; CHECK-LABEL: @not_ashr_bitwidth_mask_use1(
; CHECK-NEXT:    [[SIGN:%.*]] = ashr i8 [[X:%.*]], 7
; CHECK-NEXT:    call void @use8(i8 [[SIGN]])
; CHECK-NEXT:    [[ISNEG:%.*]] = icmp slt i8 [[X]], 0
; CHECK-NEXT:    [[R:%.*]] = select i1 [[ISNEG]], i8 0, i8 [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sign = ashr i8 %x, 7
  call void @use8(i8 %sign)
  %not = xor i8 %sign, -1
  %r = and i8 %not, %y
  ret i8 %r
}

; negative test - extra use

define i8 @not_ashr_bitwidth_mask_use2(i8 %x, i8 %y) {
; CHECK-LABEL: @not_ashr_bitwidth_mask_use2(
; CHECK-NEXT:    [[ISNOTNEG:%.*]] = icmp sgt i8 [[X:%.*]], -1
; CHECK-NEXT:    [[NOT:%.*]] = sext i1 [[ISNOTNEG]] to i8
; CHECK-NEXT:    call void @use8(i8 [[NOT]])
; CHECK-NEXT:    [[R:%.*]] = and i8 [[NOT]], [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sign = ashr i8 %x, 7
  %not = xor i8 %sign, -1
  call void @use8(i8 %not)
  %r = and i8 %not, %y
  ret i8 %r
}

; negative test - wrong shift amount

define i8 @not_ashr_not_bitwidth_mask(i8 %x, i8 %y) {
; CHECK-LABEL: @not_ashr_not_bitwidth_mask(
; CHECK-NEXT:    [[SIGN:%.*]] = ashr i8 [[X:%.*]], 6
; CHECK-NEXT:    [[NOT:%.*]] = xor i8 [[SIGN]], -1
; CHECK-NEXT:    [[R:%.*]] = and i8 [[NOT]], [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sign = ashr i8 %x, 6
  %not = xor i8 %sign, -1
  %r = and i8 %not, %y
  ret i8 %r
}

; negative test - wrong shift opcode

define i8 @not_lshr_bitwidth_mask(i8 %x, i8 %y) {
; CHECK-LABEL: @not_lshr_bitwidth_mask(
; CHECK-NEXT:    [[SIGN:%.*]] = lshr i8 [[X:%.*]], 7
; CHECK-NEXT:    [[NOT:%.*]] = xor i8 [[SIGN]], -1
; CHECK-NEXT:    [[R:%.*]] = and i8 [[NOT]], [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sign = lshr i8 %x, 7
  %not = xor i8 %sign, -1
  %r = and i8 %not, %y
  ret i8 %r
}

define i16 @invert_signbit_splat_mask(i8 %x, i16 %y) {
; CHECK-LABEL: @invert_signbit_splat_mask(
; CHECK-NEXT:    [[ISNOTNEG:%.*]] = icmp sgt i8 [[X:%.*]], -1
; CHECK-NEXT:    [[R:%.*]] = select i1 [[ISNOTNEG]], i16 [[Y:%.*]], i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 7
  %n = xor i8 %a, -1
  %s = sext i8 %n to i16
  %r = and i16 %s, %y
  ret i16 %r
}

define <2 x i16> @invert_signbit_splat_mask_commute(<2 x i5> %x, <2 x i16> %p) {
; CHECK-LABEL: @invert_signbit_splat_mask_commute(
; CHECK-NEXT:    [[Y:%.*]] = mul <2 x i16> [[P:%.*]], [[P]]
; CHECK-NEXT:    [[ISNEG:%.*]] = icmp slt <2 x i5> [[X:%.*]], zeroinitializer
; CHECK-NEXT:    [[R:%.*]] = select <2 x i1> [[ISNEG]], <2 x i16> zeroinitializer, <2 x i16> [[Y]]
; CHECK-NEXT:    ret <2 x i16> [[R]]
;
  %y = mul <2 x i16> %p, %p ; thwart complexity-based canonicalization
  %a = ashr <2 x i5> %x, <i5 4, i5 poison>
  %n = xor <2 x i5> %a, <i5 -1, i5 -1>
  %s = sext <2 x i5> %n to <2 x i16>
  %r = and <2 x i16> %y, %s
  ret <2 x i16> %r
}

define i16 @invert_signbit_splat_mask_use1(i8 %x, i16 %y) {
; CHECK-LABEL: @invert_signbit_splat_mask_use1(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 7
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    [[ISNEG:%.*]] = icmp slt i8 [[X]], 0
; CHECK-NEXT:    [[R:%.*]] = select i1 [[ISNEG]], i16 0, i16 [[Y:%.*]]
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 7
  call void @use8(i8 %a)
  %n = xor i8 %a, -1
  %s = sext i8 %n to i16
  %r = and i16 %s, %y
  ret i16 %r
}

define i16 @invert_signbit_splat_mask_use2(i8 %x, i16 %y) {
; CHECK-LABEL: @invert_signbit_splat_mask_use2(
; CHECK-NEXT:    [[ISNOTNEG:%.*]] = icmp sgt i8 [[X:%.*]], -1
; CHECK-NEXT:    [[N:%.*]] = sext i1 [[ISNOTNEG]] to i8
; CHECK-NEXT:    call void @use8(i8 [[N]])
; CHECK-NEXT:    [[R:%.*]] = select i1 [[ISNOTNEG]], i16 [[Y:%.*]], i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 7
  %n = xor i8 %a, -1
  call void @use8(i8 %n)
  %s = sext i8 %n to i16
  %r = and i16 %s, %y
  ret i16 %r
}

; negative test - extra use

define i16 @invert_signbit_splat_mask_use3(i8 %x, i16 %y) {
; CHECK-LABEL: @invert_signbit_splat_mask_use3(
; CHECK-NEXT:    [[ISNOTNEG:%.*]] = icmp sgt i8 [[X:%.*]], -1
; CHECK-NEXT:    [[S:%.*]] = sext i1 [[ISNOTNEG]] to i16
; CHECK-NEXT:    call void @use16(i16 [[S]])
; CHECK-NEXT:    [[R:%.*]] = and i16 [[S]], [[Y:%.*]]
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 7
  %n = xor i8 %a, -1
  %s = sext i8 %n to i16
  call void @use16(i16 %s)
  %r = and i16 %s, %y
  ret i16 %r
}

; negative test - wrong extend

define i16 @not_invert_signbit_splat_mask1(i8 %x, i16 %y) {
; CHECK-LABEL: @not_invert_signbit_splat_mask1(
; CHECK-NEXT:    [[ISNOTNEG:%.*]] = icmp sgt i8 [[X:%.*]], -1
; CHECK-NEXT:    [[N:%.*]] = sext i1 [[ISNOTNEG]] to i8
; CHECK-NEXT:    [[Z:%.*]] = zext i8 [[N]] to i16
; CHECK-NEXT:    [[R:%.*]] = and i16 [[Z]], [[Y:%.*]]
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 7
  %n = xor i8 %a, -1
  %z = zext i8 %n to i16
  %r = and i16 %z, %y
  ret i16 %r
}

; negative test - wrong shift amount

define i16 @not_invert_signbit_splat_mask2(i8 %x, i16 %y) {
; CHECK-LABEL: @not_invert_signbit_splat_mask2(
; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[X:%.*]], 6
; CHECK-NEXT:    [[N:%.*]] = xor i8 [[A]], -1
; CHECK-NEXT:    [[S:%.*]] = sext i8 [[N]] to i16
; CHECK-NEXT:    [[R:%.*]] = and i16 [[S]], [[Y:%.*]]
; CHECK-NEXT:    ret i16 [[R]]
;
  %a = ashr i8 %x, 6
  %n = xor i8 %a, -1
  %s = sext i8 %n to i16
  %r = and i16 %s, %y
  ret i16 %r
}

; CTTZ(ShlC) < LShrC

define i16 @shl_lshr_pow2_const_case1(i16 %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_case1(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i16 [[X:%.*]], 7
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i16 8, i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %shl = shl i16 4, %x
  %lshr = lshr i16 %shl, 6
  %r = and i16 %lshr, 8
  ret i16 %r
}

define i16 @shl_ashr_pow2_const_case1(i16 %x) {
; CHECK-LABEL: @shl_ashr_pow2_const_case1(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i16 [[X:%.*]], 7
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i16 8, i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %shl = shl i16 4, %x
  %lshr = ashr i16 %shl, 6
  %r = and i16 %lshr, 8
  ret i16 %r
}

define <3 x i16> @shl_lshr_pow2_const_case1_uniform_vec(<3 x i16> %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_case1_uniform_vec(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq <3 x i16> [[X:%.*]], <i16 7, i16 7, i16 7>
; CHECK-NEXT:    [[R:%.*]] = select <3 x i1> [[TMP1]], <3 x i16> <i16 8, i16 8, i16 8>, <3 x i16> zeroinitializer
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %shl = shl <3 x i16> <i16 4, i16 4, i16 4>, %x
  %lshr = lshr <3 x i16> %shl, <i16 6, i16 6, i16 6>
  %r = and <3 x i16> %lshr, <i16 8, i16 8, i16 8>
  ret <3 x i16> %r
}

define <3 x i16> @shl_lshr_pow2_const_case1_non_uniform_vec(<3 x i16> %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_case1_non_uniform_vec(
; CHECK-NEXT:    [[SHL:%.*]] = shl <3 x i16> <i16 2, i16 8, i16 32>, [[X:%.*]]
; CHECK-NEXT:    [[LSHR:%.*]] = lshr <3 x i16> [[SHL]], <i16 5, i16 6, i16 3>
; CHECK-NEXT:    [[R:%.*]] = and <3 x i16> [[LSHR]], <i16 8, i16 4, i16 8>
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %shl = shl <3 x i16> <i16 2, i16 8, i16 32>, %x
  %lshr = lshr <3 x i16> %shl, <i16 5, i16 6, i16 3>
  %r = and <3 x i16> %lshr, <i16 8, i16 4, i16 8>
  ret <3 x i16> %r
}

define <3 x i16> @shl_lshr_pow2_const_case1_non_uniform_vec_negative(<3 x i16> %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_case1_non_uniform_vec_negative(
; CHECK-NEXT:    [[SHL:%.*]] = shl <3 x i16> <i16 2, i16 8, i16 32>, [[X:%.*]]
; CHECK-NEXT:    [[LSHR:%.*]] = lshr <3 x i16> [[SHL]], <i16 5, i16 6, i16 3>
; CHECK-NEXT:    [[R:%.*]] = and <3 x i16> [[LSHR]], <i16 8, i16 4, i16 16384>
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %shl = shl <3 x i16> <i16 2, i16 8, i16 32>, %x
  %lshr = lshr <3 x i16> %shl, <i16 5, i16 6, i16 3>
  %r = and <3 x i16> %lshr, <i16 8, i16 4, i16 16384>
  ret <3 x i16> %r
}

define <3 x i16> @shl_lshr_pow2_const_case1_undef1_vec(<3 x i16> %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_case1_undef1_vec(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq <3 x i16> [[X:%.*]], <i16 8, i16 4, i16 4>
; CHECK-NEXT:    [[R:%.*]] = select <3 x i1> [[TMP1]], <3 x i16> <i16 8, i16 8, i16 8>, <3 x i16> zeroinitializer
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %shl = shl <3 x i16> <i16 undef, i16 16, i16 16>, %x
  %lshr = lshr <3 x i16> %shl, <i16 5, i16 5, i16 5>
  %r = and <3 x i16> %lshr, <i16 8, i16 8, i16 8>
  ret <3 x i16> %r
}

define <3 x i16> @shl_lshr_pow2_const_case1_undef2_vec(<3 x i16> %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_case1_undef2_vec(
; CHECK-NEXT:    [[SHL:%.*]] = shl <3 x i16> <i16 16, i16 16, i16 16>, [[X:%.*]]
; CHECK-NEXT:    [[LSHR:%.*]] = lshr <3 x i16> [[SHL]], <i16 undef, i16 5, i16 5>
; CHECK-NEXT:    [[R:%.*]] = and <3 x i16> [[LSHR]], <i16 8, i16 8, i16 8>
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %shl = shl <3 x i16> <i16 16, i16 16, i16 16>, %x
  %lshr = lshr <3 x i16> %shl, <i16 undef, i16 5, i16 5>
  %r = and <3 x i16> %lshr, <i16 8, i16 8, i16 8>
  ret <3 x i16> %r
}

define <3 x i16> @shl_lshr_pow2_const_case1_undef3_vec(<3 x i16> %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_case1_undef3_vec(
; CHECK-NEXT:    [[SHL:%.*]] = shl <3 x i16> <i16 16, i16 16, i16 16>, [[X:%.*]]
; CHECK-NEXT:    [[LSHR:%.*]] = lshr <3 x i16> [[SHL]], <i16 5, i16 5, i16 5>
; CHECK-NEXT:    [[R:%.*]] = and <3 x i16> [[LSHR]], <i16 undef, i16 8, i16 8>
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %shl = shl <3 x i16> <i16 16, i16 16, i16 16>, %x
  %lshr = lshr <3 x i16> %shl, <i16 5, i16 5, i16 5>
  %r = and <3 x i16> %lshr, <i16 undef, i16 8, i16 8>
  ret <3 x i16> %r
}

; LShrC < CTTZ(ShlC) < LShrC + CTTZ(AndC)

define i16 @shl_lshr_pow2_const_case2(i16 %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_case2(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i16 [[X:%.*]], 2
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i16 8, i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %shl = shl i16 16, %x
  %lshr = lshr i16 %shl, 3
  %r = and i16 %lshr, 8
  ret i16 %r
}

define i16 @shl_lshr_pow2_not_const_case2(i16 %x) {
; CHECK-LABEL: @shl_lshr_pow2_not_const_case2(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i16 [[X:%.*]], 2
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i16 0, i16 8
; CHECK-NEXT:    ret i16 [[R]]
;
  %shl = shl i16 16, %x
  %lshr = lshr i16 %shl, 3
  %and = and i16 %lshr, 8
  %r   = xor i16 %and, 8
  ret i16 %r
}

; CTTZ(ShlC) > LShrC + CTTZ(AndC)

define i16 @shl_lshr_pow2_const_negative_overflow1(i16 %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_negative_overflow1(
; CHECK-NEXT:    ret i16 0
;
  %shl = shl i16 4096, %x
  %lshr = lshr i16 %shl, 6
  %r = and i16 %lshr, 8
  ret i16 %r
}

; LShrC + CTTZ(AndC) > BitWidth

define i16 @shl_lshr_pow2_const_negative_overflow2(i16 %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_negative_overflow2(
; CHECK-NEXT:    ret i16 0
;
  %shl = shl i16 8, %x
  %lshr = lshr i16 %shl, 6
  %r = and i16 %lshr, 32768
  ret i16 %r
}

define i16 @shl_lshr_pow2_const_negative_oneuse(i16 %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_negative_oneuse(
; CHECK-NEXT:    [[SHL:%.*]] = shl i16 4, [[X:%.*]]
; CHECK-NEXT:    [[LSHR:%.*]] = lshr i16 [[SHL]], 6
; CHECK-NEXT:    call void @use16(i16 [[LSHR]])
; CHECK-NEXT:    [[R:%.*]] = and i16 [[LSHR]], 8
; CHECK-NEXT:    ret i16 [[R]]
;
  %shl = shl i16 4, %x
  %lshr = lshr i16 %shl, 6
  call void @use16(i16 %lshr)
  %r = and i16 %lshr, 8
  ret i16 %r
}

define i16 @shl_lshr_pow2_const_negative_nopow2_1(i16 %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_negative_nopow2_1(
; CHECK-NEXT:    [[SHL:%.*]] = shl i16 3, [[X:%.*]]
; CHECK-NEXT:    [[LSHR:%.*]] = lshr i16 [[SHL]], 6
; CHECK-NEXT:    [[R:%.*]] = and i16 [[LSHR]], 8
; CHECK-NEXT:    ret i16 [[R]]
;
  %shl = shl i16 3, %x
  %lshr = lshr i16 %shl, 6
  %r = and i16 %lshr, 8
  ret i16 %r
}

define i16 @shl_lshr_pow2_const_negative_nopow2_2(i16 %x) {
; CHECK-LABEL: @shl_lshr_pow2_const_negative_nopow2_2(
; CHECK-NEXT:    [[SHL:%.*]] = shl i16 3, [[X:%.*]]
; CHECK-NEXT:    [[LSHR:%.*]] = lshr i16 [[SHL]], 6
; CHECK-NEXT:    [[R:%.*]] = and i16 [[LSHR]], 7
; CHECK-NEXT:    ret i16 [[R]]
;
  %shl = shl i16 3, %x
  %lshr = lshr i16 %shl, 6
  %r = and i16 %lshr, 7
  ret i16 %r
}

define i16 @lshr_lshr_pow2_const(i16 %x) {
; CHECK-LABEL: @lshr_lshr_pow2_const(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i16 [[X:%.*]], 3
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i16 4, i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %lshr1 = lshr i16 2048, %x
  %lshr2 = lshr i16 %lshr1, 6
  %r = and i16 %lshr2, 4
  ret i16 %r
}

define i16 @lshr_lshr_pow2_const_negative_oneuse(i16 %x) {
; CHECK-LABEL: @lshr_lshr_pow2_const_negative_oneuse(
; CHECK-NEXT:    [[LSHR2:%.*]] = lshr i16 32, [[X:%.*]]
; CHECK-NEXT:    call void @use16(i16 [[LSHR2]])
; CHECK-NEXT:    [[R:%.*]] = and i16 [[LSHR2]], 4
; CHECK-NEXT:    ret i16 [[R]]
;
  %lshr1 = lshr i16 2048, %x
  %lshr2 = lshr i16 %lshr1, 6
  call void @use16(i16 %lshr2)
  %r = and i16 %lshr2, 4
  ret i16 %r
}

define i16 @lshr_lshr_pow2_const_negative_nopow2_1(i16 %x) {
; CHECK-LABEL: @lshr_lshr_pow2_const_negative_nopow2_1(
; CHECK-NEXT:    [[LSHR2:%.*]] = lshr i16 31, [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = and i16 [[LSHR2]], 4
; CHECK-NEXT:    ret i16 [[R]]
;
  %lshr1 = lshr i16 2047, %x
  %lshr2 = lshr i16 %lshr1, 6
  %r = and i16 %lshr2, 4
  ret i16 %r
}

define i16 @lshr_lshr_pow2_const_negative_nopow2_2(i16 %x) {
; CHECK-LABEL: @lshr_lshr_pow2_const_negative_nopow2_2(
; CHECK-NEXT:    [[LSHR2:%.*]] = lshr i16 128, [[X:%.*]]
; CHECK-NEXT:    [[R:%.*]] = and i16 [[LSHR2]], 3
; CHECK-NEXT:    ret i16 [[R]]
;
  %lshr1 = lshr i16 8192, %x
  %lshr2 = lshr i16 %lshr1, 6
  %r = and i16 %lshr2, 3
  ret i16 %r
}

define i16 @lshr_lshr_pow2_const_negative_overflow(i16 %x) {
; CHECK-LABEL: @lshr_lshr_pow2_const_negative_overflow(
; CHECK-NEXT:    ret i16 0
;
  %lshr1 = lshr i16 32768, %x
  %lshr2 = lshr i16 %lshr1, 15
  %r = and i16 %lshr2, 4
  ret i16 %r
}

; demanded bits path for lshr+shl+and
; Log2(LshrC) + ShlC < BitWidth

define i16 @lshr_shl_pow2_const_case1(i16 %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_case1(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i16 [[X:%.*]], 7
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i16 8, i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %lshr1 = lshr i16 256, %x
  %shl = shl i16 %lshr1, 2
  %r = and i16 %shl, 8
  ret i16 %r
}

define i16 @lshr_shl_pow2_const_xor(i16 %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_xor(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i16 [[X:%.*]], 7
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i16 0, i16 8
; CHECK-NEXT:    ret i16 [[R]]
;
  %lshr1 = lshr i16 256, %x
  %shl = shl i16 %lshr1, 2
  %and = and i16 %shl, 8
  %r = xor i16 %and, 8
  ret i16 %r
}

; Log2(LshrC) + ShlC >= BitWidth

define i16 @lshr_shl_pow2_const_case2(i16 %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_case2(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i16 [[X:%.*]], 12
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i16 32, i16 0
; CHECK-NEXT:    ret i16 [[R]]
;
  %lshr1 = lshr i16 8192, %x
  %shl = shl i16 %lshr1, 4
  %r = and i16 %shl, 32
  ret i16 %r
}

; ShlC > Log2(AndC)

define i16 @lshr_shl_pow2_const_overflow(i16 %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_overflow(
; CHECK-NEXT:    ret i16 0
;
  %lshr1 = lshr i16 8192, %x
  %shl = shl i16 %lshr1, 6
  %r = and i16 %shl, 32
  ret i16 %r
}

define i16 @lshr_shl_pow2_const_negative_oneuse(i16 %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_negative_oneuse(
; CHECK-NEXT:    [[LSHR1:%.*]] = lshr i16 8192, [[X:%.*]]
; CHECK-NEXT:    [[SHL:%.*]] = shl i16 [[LSHR1]], 4
; CHECK-NEXT:    call void @use16(i16 [[SHL]])
; CHECK-NEXT:    [[R:%.*]] = and i16 [[SHL]], 32
; CHECK-NEXT:    ret i16 [[R]]
;
  %lshr1 = lshr i16 8192, %x
  %shl = shl i16 %lshr1, 4
  call void @use16(i16 %shl)
  %r = and i16 %shl, 32
  ret i16 %r
}

define <3 x i16> @lshr_shl_pow2_const_case1_uniform_vec(<3 x i16> %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_case1_uniform_vec(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq <3 x i16> [[X:%.*]], <i16 12, i16 12, i16 12>
; CHECK-NEXT:    [[R:%.*]] = select <3 x i1> [[TMP1]], <3 x i16> <i16 128, i16 128, i16 128>, <3 x i16> zeroinitializer
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %lshr = lshr <3 x i16> <i16 8192, i16 8192, i16 8192>, %x
  %shl = shl <3 x i16> %lshr, <i16 6, i16 6, i16 6>
  %r = and <3 x i16> %shl, <i16 128, i16 128, i16 128>
  ret <3 x i16> %r
}

define <3 x i16> @lshr_shl_pow2_const_case1_non_uniform_vec(<3 x i16> %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_case1_non_uniform_vec(
; CHECK-NEXT:    [[LSHR:%.*]] = lshr <3 x i16> <i16 8192, i16 16384, i16 -32768>, [[X:%.*]]
; CHECK-NEXT:    [[SHL:%.*]] = shl <3 x i16> [[LSHR]], <i16 7, i16 5, i16 3>
; CHECK-NEXT:    [[R:%.*]] = and <3 x i16> [[SHL]], <i16 128, i16 256, i16 512>
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %lshr = lshr <3 x i16> <i16 8192, i16 16384, i16 32768>, %x
  %shl = shl <3 x i16> %lshr, <i16 7, i16 5, i16 3>
  %r = and <3 x i16> %shl, <i16 128, i16 256, i16 512>
  ret <3 x i16> %r
}

define <3 x i16> @lshr_shl_pow2_const_case1_non_uniform_vec_negative(<3 x i16> %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_case1_non_uniform_vec_negative(
; CHECK-NEXT:    [[LSHR:%.*]] = lshr <3 x i16> <i16 8192, i16 16384, i16 -32768>, [[X:%.*]]
; CHECK-NEXT:    [[SHL:%.*]] = shl <3 x i16> [[LSHR]], <i16 8, i16 5, i16 3>
; CHECK-NEXT:    [[R:%.*]] = and <3 x i16> [[SHL]], <i16 128, i16 256, i16 512>
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %lshr = lshr <3 x i16> <i16 8192, i16 16384, i16 32768>, %x
  %shl = shl <3 x i16> %lshr, <i16 8, i16 5, i16 3>
  %r = and <3 x i16> %shl, <i16 128, i16 256, i16 512>
  ret <3 x i16> %r
}

define <3 x i16> @lshr_shl_pow2_const_case1_undef1_vec(<3 x i16> %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_case1_undef1_vec(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq <3 x i16> [[X:%.*]], <i16 -1, i16 12, i16 12>
; CHECK-NEXT:    [[R:%.*]] = select <3 x i1> [[TMP1]], <3 x i16> <i16 128, i16 128, i16 128>, <3 x i16> zeroinitializer
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %lshr = lshr <3 x i16> <i16 undef, i16 8192, i16 8192>, %x
  %shl = shl <3 x i16> %lshr, <i16 6, i16 6, i16 6>
  %r = and <3 x i16> %shl, <i16 128, i16 128, i16 128>
  ret <3 x i16> %r
}

define <3 x i16> @lshr_shl_pow2_const_case1_undef2_vec(<3 x i16> %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_case1_undef2_vec(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq <3 x i16> [[X:%.*]], <i16 undef, i16 12, i16 12>
; CHECK-NEXT:    [[R:%.*]] = select <3 x i1> [[TMP1]], <3 x i16> <i16 128, i16 128, i16 128>, <3 x i16> zeroinitializer
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %lshr = lshr <3 x i16> <i16 8192, i16 8192, i16 8192>, %x
  %shl = shl <3 x i16> %lshr, <i16 undef, i16 6, i16 6>
  %r = and <3 x i16> %shl, <i16 128, i16 128, i16 128>
  ret <3 x i16> %r
}

define <3 x i16> @lshr_shl_pow2_const_case1_undef3_vec(<3 x i16> %x) {
; CHECK-LABEL: @lshr_shl_pow2_const_case1_undef3_vec(
; CHECK-NEXT:    [[LSHR:%.*]] = lshr <3 x i16> <i16 8192, i16 8192, i16 8192>, [[X:%.*]]
; CHECK-NEXT:    [[SHL:%.*]] = shl <3 x i16> [[LSHR]], <i16 6, i16 6, i16 6>
; CHECK-NEXT:    [[R:%.*]] = and <3 x i16> [[SHL]], <i16 undef, i16 128, i16 128>
; CHECK-NEXT:    ret <3 x i16> [[R]]
;
  %lshr = lshr <3 x i16> <i16 8192, i16 8192, i16 8192>, %x
  %shl = shl <3 x i16> %lshr, <i16 6, i16 6, i16 6>
  %r = and <3 x i16> %shl, <i16 undef, i16 128, i16 128>
  ret <3 x i16> %r
}

define i8 @negate_lowbitmask(i8 %x, i8 %y) {
; CHECK-LABEL: @negate_lowbitmask(
; CHECK-NEXT:    [[A:%.*]] = and i8 [[X:%.*]], 1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i8 [[A]], 0
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i8 0, i8 [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = and i8 %x, 1
  %n = sub i8 0, %a
  %r = and i8 %n, %y
  ret i8 %r
}

define <2 x i5> @negate_lowbitmask_commute(<2 x i5> %x, <2 x i5> %p) {
; CHECK-LABEL: @negate_lowbitmask_commute(
; CHECK-NEXT:    [[Y:%.*]] = mul <2 x i5> [[P:%.*]], [[P]]
; CHECK-NEXT:    [[A:%.*]] = and <2 x i5> [[X:%.*]], <i5 1, i5 poison>
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq <2 x i5> [[A]], <i5 poison, i5 0>
; CHECK-NEXT:    [[R:%.*]] = select <2 x i1> [[TMP1]], <2 x i5> zeroinitializer, <2 x i5> [[Y]]
; CHECK-NEXT:    ret <2 x i5> [[R]]
;
  %y = mul <2 x i5> %p, %p ; thwart complexity-based canonicalization
  %a = and <2 x i5> %x, <i5 1, i5 poison>
  %n = sub <2 x i5> <i5 poison, i5 0>, %a
  %r = and <2 x i5> %y, %n
  ret <2 x i5> %r
}

define i8 @negate_lowbitmask_use1(i8 %x, i8 %y) {
; CHECK-LABEL: @negate_lowbitmask_use1(
; CHECK-NEXT:    [[A:%.*]] = and i8 [[X:%.*]], 1
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i8 [[A]], 0
; CHECK-NEXT:    [[R:%.*]] = select i1 [[TMP1]], i8 0, i8 [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = and i8 %x, 1
  call void @use8(i8 %a)
  %n = sub i8 0, %a
  %r = and i8 %n, %y
  ret i8 %r
}

; negative test

define i8 @negate_lowbitmask_use2(i8 %x, i8 %y) {
; CHECK-LABEL: @negate_lowbitmask_use2(
; CHECK-NEXT:    [[A:%.*]] = and i8 [[X:%.*]], 1
; CHECK-NEXT:    [[N:%.*]] = sub nsw i8 0, [[A]]
; CHECK-NEXT:    call void @use8(i8 [[N]])
; CHECK-NEXT:    [[R:%.*]] = and i8 [[N]], [[Y:%.*]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = and i8 %x, 1
  %n = sub i8 0, %a
  call void @use8(i8 %n)
  %r = and i8 %n, %y
  ret i8 %r
}
